Corning Pyrex 50 ml Class A Volumetric Flask With Screw Cap

These 50 mL PYREX standard volumetric flasks conform to Class A capacity tolerances prescribed by ASTM. However, to facilitate transfer of crystals, salts and powders, the open end has been expanded on the 25 mL and 50 mL sizes. The standard 18-410 G.P.I. thread screw caps have a durable cone-shaped polyethylene liner. This Poly-seal cap insures a leak-resistant closure and no contamination when working with most common reagents.