O-Rings, 23mm × 3mm i.d.,pk 20 Back Catalog number: P-CP020 Manufacturer: MARKES INTERNATIONAL LIMITED Availability: In the manufacturer's stock Price on request - + Recommended HEDDEV31_5L DEVEX gas sampling bag, stopcock straight valve, 5L Price on request HEDDEV71_5L Devex Gas sampling bags 5L, PP screw cap valve, 3/16'' OD (4.76mm) Price on request TDL71_0.5L Tedlar PVF Gas Sampling Bag with PP valve, 0,5L Price on request