Buffer Standard Solution | 250ml | pH 4.0 at 20°C | Traceable to NIST

Buffer Standard Solution | 250ml | pH 4.0 at 20°C | Traceable to NIST

Marsoni

M251S

$10.72

Get it in 3 business days with 1 day shipping. Friday, May 29

Buffer Standard Solution | 250ml | pH 4.0 at 20°C | Traceable to NISTBuffer standard solution with a precise pH of 4. 0 at 20C, ideal for calibrating pH meters and sensors. Traceable to NIST standards ensures accurate and reliable calibration for scientific and industrial applications. Liquid form for easy handling and accurate measurement, suitable for laboratory or field use. Stable and consistent formulation designed to maintain pH accuracy under varying conditions. Ideal for educational, laboratory, and industrial

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I was hoping this would work for my teenage ACD and save my leather goods from being chewed on. He gnawed on it quietly I was thrilled. But I had to take it from him within a few minutes. Gnawing apparently equals chewing pieces off. Not made for chewers or gnawers. It seemed to be well made, was soft, was actually a fairly good size and didn’t get gross when it got spitty. Just didn’t work out for Captain chaos destructor of all.

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Reviewed in the United States on May 4, 2026

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Stacie

Grantham, US

★★★★★ 5

Great for large chewers

Color: Rubber Chew Toy, Size: Large

Our dogs very favorite toy. I have bought several in all colors. Good quality and it lasted a while even with my strong dogs.

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Reviewed in the United States on April 22, 2026

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cassie

Charlottesville, US

★★★★★ 5

Hard chewer pass!

Color: Rubber Chew Toy, Size: Large

Our dogs love these! They are hard chewers and am impressed they last a decent while. Good for the price!

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Reviewed in the United States on April 20, 2026

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Today

Battle Creek, US

★★★★★ 5

Airedale tough!

Color: Rubber Chew Toy, Size: Large

We have two young Airedale Terriers and I thought this would be a good inside toy for them to tug. And I was right! Very happily so. I have to admit I was surprised when I first saw it; it seemed so small. But the thing stretches and springs back to shape. We’ve had it about 2 weeks now and it is constantly played with. Absolutely the best toy! Very interactive either alone (it rolls) or with us or they play together. I am surprised how tough it is with all the constant rough play. Highly recommend!!!

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Reviewed in the United States on May 12, 2022

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Julie

Lowell, US

★★★★★ 4

Small, but twisty and fun looking. Seems relatively sturdy, though doesn't look indestructible at all.

Color: Rubber Chew Toy, Size: Large

SLIGHTLY disappointed because I thought this was bigger than it is. If you squish it all in close, it's maybe one and a half times the size of a tennis ball. (Of course, the size is probably listed; I think I just assumed, so my fault.) That being said, it's entertainingly twisty and squishy, though the rubber seems relatively sturdy. I'm not yet positive if it will hold up to the 8 month retriever/lab mix it's intended for; he tends to rip instantly through anything much less sturdy than kong natural rubber. But it seems like something that will amuse him, so we're going to give it a shot at Christmas.

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Reviewed in the United States on November 7, 2014