PTFE septum cap distributor Aijiren-Aijiren HPLC Vials Crimp Top PP Sample Vial Wholesale WHEATON Customized 1.5ml vial for hplc with ptfe liner pp cap-Aijiren 27262. black polypropylene hole cap, thread for 8-425, PTFE/silicone, septum thickness 1.5 mm