ND20 Crimp Cap is used for Crimp headspace vial. It can be used in autosampler like CTC, PerkinElme. Product Features: 1. Withstand high pressure. 2. PTFE/Silicone, PTFE/Butyl, Butyl septa are available. 3. Many cap colors are available, like silver, red, blue, gold 4. Many cap types are available, like Aluminum cap, magnetic cap, Bi-metal cap. 5.