safePort™ Low Profile O-ring Caps fit safePort™ 0.5, 1.5, and 2.0ml screw cap vials. Screw caps deliver leak-proof seal for all types of contents, ideal for life science reagent or solution. Caps and vials sold and packaged separately allow for customization on coloring and sizes desired and ease of assembly upon use. Caps are available with loop or without.