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 have experience with large working dog breeds, and I've got a mastiff lab mix puppy, who at 5 months weighs 50 pounds and is teething hard, and chews on everything. Most chew toys I've tried broke within a few minutes, but these have held up. I like that the ones I received are hollow, so I can put puppy kibbles inside them to keep the dog busy in her crate, and slow her eating so she doesn't scarf down her meals and get sick. The hole is small, but I feed small sized "taste of the Wild" brand kibbles, and they would pour out of Kong toys within seconds. I have recommended them to other puppy owners. My dog isn't an aggressive chewer, but for a teething puppy, these toys do seem to be ideal.

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Reviewed in the United States on May 9, 2022

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Jhojandra

Louisville, US

★★★★★ 3

Nice material but do not recommended for aggressive chewers

Color: Blue-Green-Orange, Color: Blue-Green-Orange

Why did you pick this product vs others?: The material is nice and easy to wash but definitely do not recommend for large breeds/ aggressive chewers. My big pup ripped one up within seconds of getting it. The ball has lasted!

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Reviewed in the United States on July 4, 2025

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Kindle Customer

San Leandro, US

★★★★★ 5

Heavy duty dog toys

Color: Blue-Green-Orange

Excellent quality and size was moderate for a puppy that's 5 months old however she's a heavy chewer and they're absolutely are holding up beautifully definitely recommend the purchase

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Reviewed in the United States on December 7, 2025

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Shaun Lanier

Charlottesville, US

★★★★★ 4

Fun

Color: Blue-Green-Orange

Dog fun

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Reviewed in the United States on April 29, 2026

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F. S. H.

Louisville, US

★★★★★ 5

Dogs love them!

Size: Large, Color: 5 Pack

May dogs loved these. The squeaks last long enough but get lots of wear and tear. Worth money for the fun. My dog is 12 and still enjoys perfect size, weight, and flexibility.

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Reviewed in the United States on March 21, 2026