Karter Scientific 213A2 Borosilicate Glass Low Form Glass Beaker, 50/100/250/500/1000 mL (Pack of 5) Contains 1 each 50, 100, 250, 500 & 1000Ml Beaker Class a & high quality inert 3.3 borosilicate glass Heavy duty reusable ASTM Specification E960, Type I requirements