... non-corrosive ,antioxidative3,Each product have good quality and a long service life.Product attributesNamesilica gel circleFull specifications20,25, ... ,47,58,70mmProduct size20mmFlanging Height12mmPackage sizeAccording to the product specification make to order the cartonsPackaging1000pcs/ctnWhether to ... to your requirements Best-selling rubber product 20mm sealing ring for Solar Water Heater