Devex Gas sampling bags 10L, PP screw cap valve, 3/16'' OD (4.76mm) Back Catalog number: HEDDEV71_10L Availability: In the manufacturer's stock Price on request - + Recommended HEDMBT71_1L Multi-layer gas sampling bags, PP valve (4.76mm), 1L Price on request 1970-0011-R O-RING -011 .301 ID X .070 W Each Price on request TDL32_2L Tedlar PVF Gas Sampling Bag with PTFE dual-valve, 2L Price on request