Tedlar PVF Gas Sampling Bag with PTFE dual-valve, 2L Back Catalog number: TDL32_2L Availability: In the manufacturer's stock Price on request - + Recommended U-T7EMP-2S Empty cold trap for UNITY series 2 Price on request U-COV450 O-Rings, low-emission,pk100 Price on request U-HSVB-20 Replacement Vial Block, for HiSorb Agitator Price on request