20 MM SEPTA, GRY BUTYL/PTFE, 1 Case

PTFE Faced Gray Butyl Septa, 20mm OD (Case of 100)            
 
WHEATON? Septa for Unlined Aluminum Seals
 
For aluminum seal finishes
PTFE is highly chemical resistant to maintain integrity of contents
Available for vials with a 13 mm and 20 mm OD
Cat. No. 224168 is a specially molded septa with a PTFE inset. The sealing surface of butyl and PTFE effect a more positive seal than plain PTFE faced septa