ECSiNG 10Pcs Top O-ring 26.5x5.3mm 87102050980 Compatible with Worcester CDi Ri Si Junior Condensate Traps

["Product Dimensions: Inner diameter 26.5mm, wire diameter 5.3mm. Manual measurements, please allow slight errors.","Replacing OEM numbers: 87102050980, which is a direct replacement for the old or broken one.","Compatibility: Compatible with Worcester CDi, Ri, Si and junior condensate traps.","Function: Ensures the airtightness and watertightness of this critical interface, preventing condensate leakage and flue gas leakage, ensuring the safe and efficient operation of the boiler.","Product packaging:Product include a total of 10pcs O-Rings, which can completely meet your daily use needs and replacement."]