Cap Diameter 33 mm Screw Closure Size 33-430 mm Closure Material Polypropylene Product Type Screw On Cap Closure Color Black Closure Liner Material Polypropylene/Silicone Closure Type Screw On Autoclavable Yes Vented No Special Features Low-Compression-Set Silicone Ideal For Storage of Samples For Prolonged Periods of Time Over Wide Temperature Ranges Closure Liner Design Solid Package Quantity 50