Tedlar PVF Gas Sampling Bag with PP valve, 6L, 3/16'' OD (4.76mm) Back Catalog number: HEDTDL71_6L Availability: In the manufacturer's stock Price on request - + Recommended U-T18325-2S EPA 325 cold trap, UNITY 2/xr and TD-100/xr Price on request 1235 BALLOONS FOR GAS SAMPLING, 8Liters Price on request U-T19PAH-2S PAH cold trap, UNITY 2/xr and TD-100/xr Price on request