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-ULKIT TD automation/ULTRA-xr starter kit Price on request C-HSPH HiSorb handle, for manual probe extraction Price on request C-KIT325T-2S 325 Tube Kit Price on request