1.Solar Water Heater Rubber Parts 2.20,25,47,58,70mm 3.RoHS;ISO9001 certification 4.Material:silicone 5.Long lifetime Products feature1,made of 100% silicone material 2,nontoxic, odorless, non-corrosive ,antioxidative3,Each product have good quality and a long service life. Product attributesNamesilica gel circleFull specifications20,25,32,47,58,70mmProduct size20,25,47,58,70mm Flanging Height 4. ...