11 mm Crimp Cap & TruSeal (100/pk)

11 mm aluminum crimp cap pre-stuffed with TruSeal(TM). TruSeal is a silicone/PTFE seal for pennies more than rubber. They offer lower permeability and bleed than natural rubber, and resist degradation to 250 deg. C. Because the TruSeal is soft, lower crimping force is recommended. PTFE layer; total thickness is 1.1 mm. Fits 12x32 mm, 1.8 mL crimp-top vials. Packaged: 4 in. x 6 in. plastic bag; Weight: 37.5 g.