Stopper Stopper Size 11.5 Neck Size 25 mm Screw Closure Size 25 mm Bottom Diameter 50 mm Top Diameter 63 mm Overall Height 25 mm Material EPDM Rubber Product Type Stopper Color Black Autoclavable No Number of Holes 1 Standards Not Applicable Special Features Not Applicable Resists Abrasion and Water For Labware Type Bottles Vials Liner Material Not Applicable Hole Diameter 5 mm Package Quantity 6