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School district in Boston, MA added to a quote 25 units · 3h ago
12 x 35 mm Cross Head Stir Bar
12 x 35 mm Cross Head PTFE coated Alnico V stir bar. The cross shaped fins provide greater mixing action at the top, bottom and sides of the container, even at low speeds. These stir bars are excellent for round bottom flasks and test… Full details
Starting at
$1,698.77
per unit · list price
31 in stock across 1 config · fastest ship same-day
Pick a grade & ship speed
Live stockPer unit
$1,698.77
Line total
$1,698.77
Evaluate before you commit?
Order a single unit to evaluate. Free shipping, 30-day quote lock on the fleet tier.
- Free shipping
- 30-day quote lock
- Credits fleet PO
Fleet pricing from 10+ units auto-applies on the signed quote. Start a quote instead →
Highlights
- PTFE, polytetrafluoroethylene has a remarkable chemical resistance. It is insoluble in all known solvents and will only react with molten alkali metals and fluorine at high temperatures. PTFE may be used at temperatures up to 260C and it is autoclavable. PTFE accounts for 18% of stir bar diameter
Grade rubric
What each grade actually looks like.
Published criteria, photo-exemplar rubric, same 12-month warranty across every grade. If a received unit doesn’t match its listed grade, refund, re-grade, or replace within 30 days — your choice.
OEM list
Factory-sealed from authorised channels
Cosmetic
Unopened, shrink-wrapped retail packaging. Indistinguishable from the OEM site — because it is.
Best for
Executive rollouts, compliance-sensitive deployments, or when OEM warranty terms are required.
−40 to −50%
Most popular for fleet refreshes
Cosmetic
Near-new. Minor scuffs visible only on close inspection. Keycap wear imperceptible. No dents, cracks, or faded logos.
Best for
Standard issue for knowledge workers. Looks new on a Zoom call; ages well through a 3-year cycle.
−55 to −65%
Best value for rollouts
Cosmetic
Visible wear at arm’s length — palmrest sheen, keycap smoothing, minor chassis dings. No dents, cracks, or damage that would affect function.
Best for
Loaner pools, onboarding kits, dev-pool machines, shared workstations, secondary device issuance.
−65 to −75%
Deepest value tier
Cosmetic
Heavy cosmetic wear — scratches, scuffs, or minor dings that don't affect function. Fully tested, same 12-month warranty.
Best for
Education labs, warehouse floors, kiosks, harsh-environment deployments, high-churn use cases.
Grade mismatch on arrival? Refund, re-grade, or replace within 30 days — no photo forensics required. Grade-accuracy dispute rate tracked here.
Unsure which grade?
Answer 3 questions. We'll pick the right grade for you.
Most first-time refurb buyers over-spec. The fit-your-use-case tier is usually one step cheaper than you'd guess.
Volume pricing
Build your quote in real time.
Per unit
$1,647.81
was $1,698.77 · −3%
Line total
$16,478
saves $509.60 vs list
Lead time
1–2 business days
31 on the floor
On signed quote
24 business hours
ACH · Wire · PO · NET 30
Small team perks: 3% off · list-locked pricing. Volume tiers auto-apply to the signed quote. For 250+ units we reserve matched batches by spec and grade.
Who's buying this
Procurement pattern, last 90 days.
IT teams bought
23
distinct buyer orgs, rolling 90 d
Units shipped
71
across every grade + config
Typical order
33
median units per PO
Repeat buyers
35%
placed a second PO within 6 mo
Buyer size distribution
- 20% 1–49 seats
- 27% 50–499 seats
- 53% 500+ seats
Sweet spot: 50–499-seat IT teams running fleet refreshes. See pricing program →
How it's deployed
- Fleet refresh 40%
- Loaner / hot-swap pool 13%
- New-hire onboarding 27%
- Branch expansion / field 20%
35% of buyers refreshed from prior-gen batch or earlier.
Recent anonymised POs
vertical · units · days-ago
- PO Regional MSP 23units 8 d ago
- PO Insurance carrier 113units 10 d ago
- PO Nonprofit 9units 52 d ago
PO-level vertical + size — no customer identifiers. Hashed aggregates refreshed nightly.
Price transparency
What this unit has cost over the last 90 days.
Today
$1,699
Median 90-d
$1,723
90-d range
$1,661 – $1,793
Volatility
7.7% · Typical
3-year lifetime cost
What it really costs to own one.
- = Unit list price Per-unit, any grade $1,699
- + 3-yr energy 0 kWh/yr @ $0.13/kWh $0.00
- + Warranty + NET 30 Included · $0 upcharge $0.00
- − Residual @ 36-mo buyback We buy back at ~10% of list −$170
Net 3-year TCO
per unit, incl. energy − residual
$1,529
Vs. buying new-equivalent
37%
less per unit at list
Kept in your stack
Typical fleet keeps this model 3–4 years. End-of-life: we buy back at ~10% of list, data-wipe to NIST 800-88, and issue a Scope 3 CO₂ offset statement.
Pre-quote the buyback →Every unit includes
No upgrade tier, no asterisks.
12-month fleet warranty
Advance-replacement for 50+ unit active fleets. Claim-rate tracked publicly on /transparency.
Serial + spec CSV
Every unit ships with its serial, grade, and functional-test result exported to your CMDB format.
NIST 800-88 sanitisation
Every storage drive purged to NIST Purge before resale. Per-drive Certificates of Sanitisation on request.
Volume tiers auto-applied
3% at 10+, 6% at 50+, 9% at 250+, 12% at 1000+ — locked on the signed quote, no haggling.
NET 30 on approval
Credit decisioned in 2 business days. ACH, wire, card, and PO all accepted. Tax-exempt on file.
30-day return window
Including grade disputes — refund, re-grade, or replace at your choice. No photo forensics.
Published grading rubric
Grade A = near-new, B = visible wear at arm’s length, C = heavier cosmetic wear. Photo exemplars on the grade page — no hidden downgrade language.
CO₂ avoided, in writing
Per-PO ESG disclosure with Scope 3 Category 1 mapping. Format your sustainability team files directly.
Frequently added together
5-pack · save 8%
Standard MSP / reseller break pack · added by 55% of IT teams on POs for this SKU.
- $1,699
12 x 35 mm Cross Head Stir Bar
This unit · primary line of the bundle
- $8,494
12 x 35 mm Cross Head Stir Bar · ×5
Same SKU, batched shipment
- Sum of parts
- $10,193
- Bundle price
- $9,513
- You save
- $680
Bundle discount auto-applies when all lines are on the same signed quote. Swap any line during the quote review.
Not ready to commit?
Lock this price. We'll email it to you.
We'll hold $1,699/unit for 30 days and send a PDF with the spec sheet, volume pricing, warranty detail, and a quote-ready link — nothing else.
- 30-day price lock
- PDF spec sheet attached
- No sales follow-up
Teams running this in production
What IT teams like yours actually say.
We spec 30-50 refurb ThinkPads a month for our MSP clients. The per-PO grade CSV drops straight into our CMDB. Haven't hunted a serial number in a year.
Marcus Holt
Founder · Northbrook Managed IT
MSP · 12-person MSP · 4k client endpoints
Published tier pricing means no back-and-forth with sales. I configure, the CFO reviews, we sign. Our vendor cycle on endpoint refresh dropped from 6 weeks to 9 days.
Reese Taylor
IT Operations Lead · Pioneer K-12 District
K-12 Education · 11,000-student district
NIST 800-88 certs per drive were the unlock. Our HIPAA auditors now get a clean paper trail for every retired laptop. The claim rate they publish on /transparency was the tiebreaker.
Dr. Sofia Ramirez
VP, IT & Security · Cedar Hills Health Network
Healthcare · 2,100-employee network
Answers before you buy
Frequently asked questions
Grading How do grade letters translate to what we receive?
Deployment Can you apply our asset tags and emit serials before shipment?
Compliance How do you handle drives and prior-customer data?
Warranty What does the 12-month warranty actually cover?
Terms Can we get NET 30 terms and a blanket PO?
Logistics Do you support blind drop-ship for MSPs and resellers?
Keep browsing
Similar products shoppers also consider
Good for
- Paired with larger compute POs as ancillary inventory
- Volume top-ups for MSP / reseller buy-through
Watch out for
- Cosmetic condition varies by grade — Grade B is the visible-wear tier
- Grade A batches sell out first during refresh season (Jun / Jan)
- Pre-ship Autopilot enrolment adds 1 business day to lead time
Skip if
- Your primary need is compute, imaging, or display hardware
About this model
12 x 35 mm Cross Head PTFE coated Alnico V stir bar. The cross shaped fins provide greater mixing action at the top, bottom and sides of the container, even at low speeds. These stir bars are excellent for round bottom flasks and test tubes. Alnico V magnetic cores are an alloy composed of Aluminum, Nickel, and Cobalt. These magnets are one of the most powerful permanent magnet alloys available.
What's in the box
- The unit itself
- 12-month warranty card
- Recyclable fibre packaging
Need custom packaging (PO-branded, bulk-ship, or reseller blind)? Flag it in the quote request.
Additional specs
1- ModelNumber
- 304495-6
Months 0–12
12-mo warranty · every grade
Advance-replacement for 50+ active fleets
Functional defects covered on every grade — A, B, or C — for 12 months from ship date. 50+ active-unit fleet customers get advance-replacement: the replacement ships from the same spec + grade before the faulty unit is returned. Grade-match not possible? You pick spec-upgrade credit, pro-rata refund, or part-out. Claim rates are published on /transparency.
DOA rate
0.4%
Rolling 90-d
Median RMA
3.2 d
Filed → shipped
Advance-replace rate
96%
Fleet customers
Return window
30 d
No restocking fee
Datasheet (PDF)
On requestManufacturer spec sheet + supported configurations
Functional QA report
Per PO43-point inspection results for the batch this unit shipped from
Certificate of Sanitisation
Per PONIST 800-88 Purge evidence per drive
Chain-of-custody log
On requestFrom intake to dispatch (HIPAA / public-sector)
ESG / Scope 3 disclosure
Per POEmbodied carbon avoided + kg diverted, per PO
