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-COV1516 Spare O-ring, black, for POD sampler (support body), pk 10 Price on request TDL71_10L Tedlar PVF Gas Sampling Bag with PP valve, 10L, 3/16'' OD (4.76mm) Price on request HEDFEP32_5L FEP gas sampling bag with PTFE dual-valve, 5L Price on request