... DN100,DN125,DN150,DN175,DN200 2.Mat:rubber 3.Color: White,Black Truck-mounted concrete pump partsWe ... common size,other sizes upon to your request 4.reducer Material:45Mn2,Length:1.2M,1.6m ... ) rubber hose:DN 125mm and DN 150mm ,3 or 4 meters,other sizes upon your request rubber piston ... SANY,Zoomlion,etc. Pictures concrete pump sealing rings Concrete pump sealing rings without lip(3'',4'',5'',6'',7'',8'',9'')