Magnetic Seals w/Septa, 20 mm, preassembled, 8mm hole

8 mm hole is compatible with the Combi Pal. BiMetal and standard magnetic crimp-cap seals are more rigid than aluminium crimp-cap seals and require more force to seal and decap. To prevent user fatigue, Restek recommends using high-power electronic crimpers/decappers instead of manual or battery-powered crimpers/decappers when using BiMetal and standard magnetic crimp-cap seals.