Stopper, Stopper Size 2, Neck Size 25 mm, Screw Closure Size 25mm, Bottom Diameter 16 mm, Top Diameter 20 mm, Overall Height 25 mm, Material EPDM Rubber, Product Type Stopper, Color Black, Autoclavable No, Number of Holes 0, Standards Not Applicable, Special Features Not Applicable, Resists Abrasion and Water, For Labware Type Bottles, Vials, Liner Material Not Applicable, Package Quantity 50