12 mm PTFE/Silicone/PTFE Seal TT (100/pk)

12 mm red PTFE/white silicone/red PTFE seals fit 13-425 thread screw caps. PTFE layer on both sides. Double coating of PTFE reduces coring and inlet plugging; resealable. Packaged: 4 in. x 6 in. plastic bag; Weight: 19.8 g.