Devex Gas sampling bags 5L, PP screw cap valve, 3/16'' OD (4.76mm) Back Catalog number: HEDDEV71_5L Availability: In the manufacturer's stock Price on request - + Recommended T-7CUS cust packed cold trap, TT24-7 Price on request HEDFLD32_2L Fluode gas sampling bag with PTFE dual-valve, 2L Price on request U-T18325-2S EPA 325 cold trap, UNITY 2/xr and TD-100/xr Price on request