LC Vials and Closures LC Vials and Closures Description Certified Unit Part No. 6 mL Screw Top Vials and Closures Clear, flat bottom ] 100/pk Clear, extreme high recovery ] 30/pk 5188-2757 Screw caps, 16 mm ] 100/pk 9301-1379 PTFE/silicone septa ] 100/pk PTFE/silicone septa, pre-slit ] 100/pk 5 mL Screw Top Vials