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 M-MCHOR250HT O-Ring, micro-chamber pan seal,pk 4 Price on request HEDFEP32_2L FEP gas sampling bag with PTFE dual-valve, 2L Price on request T-7CUS cust packed cold trap, TT24-7 Price on request