网页Hawach septa and cap for crimp top sample vials provide the tightest seal, PTFE/silicone septa + Aluminum cap, for crimp top 2ml vial (11 mm mouth). Crimp vial 20 mm – Sigma-Aldrich Results 1 – 30 of 98 Septa for 20 mm crimp seals · Vials, crimp top, requiring a 13 mm seal · Crimp cap, 20 mm, aluminum · Push-On Caps for 20 mm headspace vials