Cap Diameter 34 mm Screw Closure Size 29-14 mm Closure Material HDPE Product Type Screw On Cap Closure Color Green Closure Liner Material Unlined Closure Type Screw On Autoclavable Yes Septa Included No Vented No Mouth Size Narrow Standards Not Applicable Special Features Only For 50mL Centrifuge Tubes Closure Liner Design Molded-In Seal Ring Package Quantity 1000