QORPAK Closure,28 mm Dia,Natural,PK500

Closure; Diameter 28 mm; Screw Closure Size 28-400 mm; Closure Material PTFE; Product Type Disc Closure; Closure Color Natural; Closure Liner Material PTFE; Closure Type Disc Liner; Autoclavable Yes; Septa Included No; Vented No; Mouth Size Narrow; Standards Not Applicable; Special Features For Use with Unlined Closures As A Chemical Barrier and Helps Prevent Leakage; Closure Liner Design Flat; Package Quantity 500