... 2.Mat:rubber 3.Color: White,Black Truck-mounted concrete pump partsWe are a manufacturer specialized in several kinds of concrete ... brief introduction of our products: we produce and supply concrete pump parts(fitting to Schwing and PM , Sany, Zoomlion,CIFA) ... ring Fitting to schwing,PM,SANY,Zoomlion,etc. Pictures concrete pump sealing rings Concrete pump sealing rings (polyurethane,with lip)