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 C-CRCK Canister Rack Connection Kit, for connecting 15 x 1/4" outlet canisters to U-RACK02 Price on request U-T5O3F-2S Ozone precursors/Freon cold trap Price on request OST-201-3424 Tube gas sampling 150ml nozzle (GL14), septum Price on request