Cap, Diameter 13 mm, Screw Closure Size Not Applicable, Closure Material Polyethylene, Product Type Snap Cap, Closure Color Gray, Closure Liner Material Unlined, Closure Type Snap On, Autoclavable No, Septa Included No, Vented No, Mouth Size Not Applicable, Standards , Special Features Allows Tubes to be Stacked Closely in Racks with The Easily Removable One Thumb Tab, Closure Liner Design Not Applicable, Package Quantity 1000