Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: HEDPOL32_2L Availability: In the manufacturer's stock Price on request - + Recommended M-SPGSC-250 Adjustable sprung spacer, for M-CTE250I,pk 4 Price on request U-CENKIT Starter Kit: Centri booster pack (DiffLok caps and O-rings) Price on request HEDDEV71_5L Devex Gas sampling bags 5L, PP screw cap valve, 3/16'' OD (4.76mm) Price on request