Cap Diameter 81 mm Screw Closure Size 67-26 mm Closure Material Polycarbonate Product Type Erlenmeyer/Fernbach Flask Cap Closure Color Green Closure Liner Material Synthetic Olefin Rubber Closure Type Screw On Autoclavable No Septa Included No Vented No Mouth Size Wide Standards Not Applicable Special Features Oversized Vent For Improved Gas Exchange Closure Liner Design Molded-In Seal Ring Package Quantity 24