Open Top Crimp Cap with CLEAR PTFE/Red Rubber vial cap , bottle cap , PTFE septa Open Top Crimp Cap with CLEAR PTFE/Red Rubber , vial cap , bottle cap , PTFE septasize: 8, 9, 10, 11, 20mmUsed for chramatography labrotariesDifferent colors of PTFE films are avaiable FEATURESManufactured to OrderConditioned for Ultra Low BleedSoft, Strong Premium SiliconeBorn on date is on each package ...