Devex Gas sampling bags 10L, PP screw cap valve, 3/16'' OD (4.76mm) Back Catalog number: HEDDEV71_10L Availability: In the manufacturer's stock Price on request - + Recommended U-COV03 O-Ring, Size 003, pk 10 Price on request RMK-0020 Routine Maintenance Kit: Tube conditioner (TC-20) Price on request U-COV06 O-Ring, Size 006, pk/10 Price on request