SAMPLE VIALS, CLEAR, PTFE LINED CAPS, LAB-PAC - Chemglass. CG-4910-01, Screw Cap, Open Top, 13-425, Black, with PTFE Faced Silicone Septa, P144 Reusable Glass/Plastics Subject to Vials/Containers Discount. Sample Vials and Accessories - Waters Corporation. Vials, Plates and Seals for Alliance HPLC Systems. are the best choice.