PYREX® Class A Volumetric Flasks with Screw Cap, Corning 5650

Corning® PYREX® standard volumetric flasks with threaded screwcaps 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 25mL size. The standard 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.