Tedlar PVF Gas Sampling Bag with PP valve, 6L, 3/16'' OD (4.76mm) Back Catalog number: HEDTDL71_6L Availability: In the manufacturer's stock Price on request - + Recommended C-CRCK Canister Rack Connection Kit, for connecting 15 x 1/4" outlet canisters to U-RACK02 Price on request U-T4WMT-2S Water Management, ethane - C20, cold trap Price on request U-T9TNX-2S Unity 2/TD-100 Cold trap, Tenax TA Price on request