Glass Erlenmeyer Flask Set - 3 Sizes - 50, 150 and 250ml, Karter Scientific Description Features: Contains 1 each 50, 150 and 250ml Flask High quality inert 3.3 borosilicate glass Heavy Duty Reusable ASTM Specification E960, Type I requirements ID/OD: 50ml: 24.5/30.5mm, 150ml: 32/37mm, 250ml: 32/37.5mm. Product Details: Material: Borosilicate Glass Capacity: 250 Milliliters Brand: Karter Scientific Bottom Shape: Round Is Discontinued By Manufacturer ‏ : ‎ No Package Dimensions ‏ : ‎ 6.85 x 6.57 x 5.59 inches; 13.05 Ounces Item model number ‏ : ‎ 214U2 Date First Available ‏ : ‎ August 9, 2012 Manufacturer ‏ : ‎ Karter Scientific Best Sellers Rank: #12,291 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #3 in Lab Erlenmeyer Flasks #3 in Lab Erlenmeyer Flasks Customer Reviews: 4.7 4.7 out of 5 stars 2,581 ratings