Shimadzu 24-400 TOC/VOC EPA vials - glass sample vials EPA, VOA, VOC, TOC Vials Amber Clear Glass Screw Vials 24-400 Screw Neck Vials 40ml Vials Use for TOC & Purge and Trap System With Writing Spot or without Screw PP Caps, Closed top or with 15mm centre hole Cap Color: White, Black, Red Septa: Nature PTFE/Nature Silicone Septa Size: 22*3mm .