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Test Tube pH Pens
Test Tube pH Pens
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Test Tube pH Pens

Marsoni M251S
Sale price$63.25
Pay 4 payments of $15.81 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Test Tube pH PensFits standard test tubes 16 x 50 mm or larger. Highly stable and accurate readings with a large LCD display. Designed for simple one hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize some other non standard buffers as well. Features hold function, and auto power off with low battery indicator. General Purpose Glass Probe: EPA compliant for labs and wine Penetration Probe: for food & soil Flat Tip
Easy Shipping

Quick Dispatch:

Your Test Tube pH Pens orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 1479 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Houston, US
★★★★★ 5
Great OEM replacement at hlaf the cost
Looks exactly like the OEM filter a quality product. it is the same size fit and performance. Filter replacement is fast 10 min tops, it's crazy how much a dealer charges to replace it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2025
E
Verified Purchase
Elliot
Pawtucket, US
★★★★★ 5
As good as Honda OEM
Perfect fit. Lasts as long as OEM for 25% of the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
F
Verified Purchase
Fatman
Dallas, US
★★★★★ 5
Great fit
Perfect fit. FYI - I bought the exact same one on EBAY FOR $11.78
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
A
Verified Purchase
Amazon Customer
Lexington, US
★★★★★ 5
East
Easy to replace and great fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2026
T
Verified Purchase
Tom
Fort Morgan, US
★★★★★ 5
Perfect fit
Nice quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2025

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