

20mm Vial Stopper, Teflon/Silicone Septas, Pack of 50
20mm Vial Stopper, Teflon Silicone Septas, Pack of 50, Highest chemical resistance available. Teflon coating on one side of a solid white isoprene rubber septa. Can be used in conjunction with any of our 20mm aluminum seals on this website.
20mm vial septas are for serum vials with a 13mm hole opening and 20mm outside rim-to-rim outer diameter.