Glass Graduated Cylinders - Education & Research Equipment for Industrial & Academic Labs - Borosilicate Glass Measuring Cups – Science Laboratory & Chemistry Classroom Supplies (100mL, 4-Pack)

Absolutely HORRIFYING!! Worst quality I have EVER seen in my LIFE!! I only opened two boxes before I had to stop. The cylinders appear to be rejects being sold as new. The first cylinder had molding defects in the base. The second cylinder had a chipped base and the markings were partially scraped off. Both were scratched up. Both were very dirty, had glass dust and finger prints all over them! This came from the factory like this, because they were well packaged, sealed with a sticker and had no signs of being tampered with, so they were shipped this way!The quality of the cylinders are very poor. They are very thin and made with the least amount of glass physically possible. Quite honestly, the packaging probably cost more money then the cylinders. I absolutely cannot use these. How did they get such high ratings? These are pure garbage!

I bought 2 boxes of 4 - 100ml grad cylinders as a low budget replacement for my science classroom. They are almost half the cost of the better cylinders. Unfortunately they are very thin walled glass and may not last long. The cylinders are not all the same height, but it seems the marking are starting at the same distance at the base. The first marking is 10ml, so it cannot be used for anything less than 10ml. I used a 50ml burette to test the accuracy and there were differences of up to 2ml. The bases were also uneven is some and the container wobbled on a flat countertop. But, with the level of labs we do, the need to replace broken glassware often, these cylinders will work fine.

I own a soil and tree lab. I got caught short, and needed these, in a day's time. Amazon came through. These GC's are of excellent quality. The included brushes are a nice touch. Thanks!Recommended.

The markings on these are completely off. Bummer!

I liked the different sizes contained in the kit, however the cylinders are super fragile.