8mm PTFE Lined Seal, Silver, Pack of 100. Works on both dental cartridges and chromatography vials that have and 8mm crimp neck finish.
13mm PTFE Lined Seal, Silver, Pack of 100. Works on both dental cartridges and chromatography vials that have and 13mm crimp neck finish (7mm hole opening and 13mm crimp neck finish).
20mm Vial Stopper, Teflon/Silicone Septas, Pack of 50
20mm Aluminum Vial Seals with Teflon Septa, Pack of 100