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 HEDNDV32_2L New DEVEX gas sampling bags with PTFE dual-valve, 2L Price on request C-HSPH HiSorb handle, for manual probe extraction Price on request C-TDKIT-01 Essential TD Starter Kit Price on request