Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 2L Back Catalog number: TDL31_2L Availability: In the manufacturer's stock Price on request - + Recommended M-SPC15-120 Collar spacer, alum 15mm, for M-CTE120I,pk 6 Price on request C-CRCK Canister Rack Connection Kit, for connecting 15 x 1/4" outlet canisters to U-RACK02 Price on request SERZ-1076 Spare filter assembly, ACTI-VOC Price on request