Our measuring cylinders are absolutely the best way to measure liquids. They are extremely accurate. Made of polypropylene, they have very excellent resistance to all chemicals. Easy to read, molded graduations will not rub off like the cheap painted ones. They are available in 4 sizes: 2000ml with 20 ml graduations, 1000ml with 10 ml graduations, 500ml with 5 ml graduations, and 250ml with 2 ml graduations. Made in the USA!