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 TDL71_0.3L Tedlar PVF Gas Sampling Bag with PP valve, 0,3L Price on request U-T8CUS-2S cust packed cold trap, UNITY 2/xr and TD-100/xr Price on request U-RACK02 Maxi Rack (1 L to 6L canisters) Price on request