Aijiren provides 20mm Crimp Headspace Vial, Aluminum Cap, PTFE and Silicone double-sided Septa, as well as Hand Crimper for sealing and Decrimper for unsealing. Customers can purchase them individually or in a package, which is convenient for your laboratory.The Septa specification provided by Aijiren is 20*3mm, and the Cap has center holes of different sizes depending on the type.