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Test Tube pH Pens
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
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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
4.4 ★★★★★
Based on 1641 reviews
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Product Reviews
S
Verified Purchase
Sharon
Louisville, US
★★★★★ 5
Chew toy that will last!
Color: Blue&Red Fish
Great toy for a real chewer. It's been in the house for about 5 days and the toy is still intact and the squeaker is still squeaking.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
D
Verified Purchase
Doris D.Willingham
Belleville, US
★★★★★ 5
My puppy love these.And he's an extra large american bully , so he put them through their paces
Color: Blue&Red Fish
These toys were an excellent choice. My puppy really enjoyed him and he's definitely an aggressive chewer.He's an extra large american bully. But a big baby, especially when it comes to his toy\nOf course he's tough on them But These definitely held up well. So if you have a.n aggressive Chewer these are an excellent choice
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
A
Verified Purchase
Amanda Vinzant
Boise, US
★★★★★ 5
Great toy for aggressive chewers
Color: Purple & Blue
My dog loves this!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
J
Verified Purchase
Jellyshodi
Louisville, US
★★★★★ 5
Good chew toy
Color: Purple & Blue
Our golden retrievers love these. They last awhile too
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
S
Verified Purchase
Shan
Lexington, US
★★★★★ 5
Dog toy is tough and durable
Color: Blue&Red Fish
It’s great for aggressive chewers, my pittbull loves it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026

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