Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 2L Back Catalog number: HEDTDL31_2L Availability: In the manufacturer's stock Price on request - + Recommended U-COV108-H O-ring, Injector Liner, Black, High Temp, pk/1 Price on request HEDTDL71_6L Tedlar PVF Gas Sampling Bag with PP valve, 6L, 3/16'' OD (4.76mm) Price on request HEDNDV32_2L New DEVEX gas sampling bags with PTFE dual-valve, 2L Price on request