Stopper, Stopper Size 0, Neck Size 24 mm, Screw Closure Size 24mm, Bottom Diameter 10 mm, Top Diameter 15 mm, Overall Height 25 mm, Material Natural Rubber, Product Type Stopper, Color Black, Autoclavable Yes, Number of Holes 0, Standards Not Applicable, Special Features Low Sulfur Content, Withstand Temperatures From - 25 to 70 Degrees C (-13 to 158 Degrees F), Resists Abrasion and Water, For Labware Type Erlenmeyer Flasks, Test Tubes, Liner Material Natural Rubber, Package Quantity 90