Polyester gas sampling bag with PTFE dual-valve, 5L Back Catalog number: HEDPOL32_5L Availability: In the manufacturer's stock Price on request - + Recommended U-COV450 O-Rings, low-emission,pk100 Price on request P-CPS20 Dowty seals, for VOC-Mole cap assembly,pk 20 Price on request 1232 BALLOONS FOR GAS SAMPLING, 2Liters Price on request