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 SERZ-1070 Spare bag sampling accessory, ACTI-VOC Price on request P-CP010 VOC-Mole cap assembly,pk10 Price on request SERLFP-5003 Spare back pressure adapter, ACTI-VOC Price on request