Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: HEDMBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended M-MCHOR O-Ring, micro-chamber pan seal, for M-CTE120I,pk 6 Price on request T-3GBGE CW agents cold trap, TT24-7 Price on request C-CRCK Canister Rack Connection Kit, for connecting 15 x 1/4" outlet canisters to U-RACK02 Price on request