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 U-RACK02 Maxi Rack (1 L to 6L canisters) Price on request RMK-0020 Routine Maintenance Kit: Tube conditioner (TC-20) Price on request OST-201-0246 Screw caps for screwthread tubes GL14, bore 8mm Price on request