Product Introduction. 1)Description. 11mm Silver Alunimum crimp cap with PTFE/Silicone Septa matched with 2ML 12*32 autosampler vial, it’s good use for gas chromatography filed,except silicone material, butyl and natural rubber is popular too. Send Inquiry Chat Now China hplc vials and caps for wholesales-Aijiren HPLC Vials