20mm Septa found in: 20MM SEPTA, TFE/SIL, 20MM SEPTA, RED SILICONE, 20mm Crimp Seals without Septa, Septa for 20mm Crimp Seals, Septa,HS,20mm,gry ml PTFE.. Quick, convenient, and minimize contamination 20mm Crimp seals with prefitted septa for headspace vials Seals with pre-inserted septa are convenient and minimize contamination due to handling Use magnetic seals