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-COV10 O-Ring, low-emission,size 010, pk10(e2/e3 systems) Price on request 1235 BALLOONS FOR GAS SAMPLING, 8Liters Price on request U-COV1517 Spare O-ring, brown, for POD sampler (diffusive body), pk 20 Price on request