1.Model:DN80,DN100,DN125,DN150,DN175,DN200 2.Mat:rubber 3.Color: White,Black Truck-mounted concrete ... 3meters is standard length,other length as to your request.2. elbow,reducing elbowmaterial:Hi-Mn13size:DN 125mm or DN 150mm ... :90, 60,45,30,153. couplingmaterial:Hi-Mn13size:from 2 to 6inch,DN125mm and DN 150mm is the common size ... Concrete pump sealing rings without lip(3'',4'',5'',6'',7'',8'',9'')