One Cap Fits 4 Tube Sizes - Saves Space and Money

Ingenious design uses both ends of the cap to fit FOUR tube sizes.

• Unique design fits four sizes of tubes: 10mm, 12mm, 13mm, 16mm
• Easily inserted with one hand
• Fits common test tubes and specialty tubes, both glass and plastic
• Economical and space saving! Purchase and store one cap instead of four different sizes - bulk count adds to your savings
• Seven cap colors coordinate with most common and popular tube colors for ease of use
• Semi-flexible polyethylene construction is leak-resistant and preserves sample integrity, both at room temperature and refrigerated (freezing not recommended), and minimizes evaporation loss
• Crack-resistant caps fit snugly and will not fall off during agitation (centrifuge not recommended)
• Non-sterile