Dynarex LabChoice Universal Plug Caps are designed to provide a reliable seal for a range of tube sizes for optimal versatility. Crafted from durable polyethylene, these premium caps help minimize the risk of leakage and cross-contamination. These flexible, re-sealable caps are suitable for tubes with diameters of 10 mm, 12 mm, 13 mm, and 16 mm. Available in two colors, neutral and blue, for clear sample identification. 1000 PER BAG, 10 BAGS PER CASE