Product name: concrete pump rubber seal Size:DN50,DN80,DN100,DN125,DN150,DN180,DN200,from 2inch to 8inch other sizes upon clients¡¯ requirement Material:Natural rubber,silicone, polyurethane Color:black,milky white or as request Hardness:40/50-60/70-80 Special features:high temperature resistance, good cold flexibility,  good resistance to acids and alkalis, weather and aging resistance Application Used in concrete pump truck.,concrete pump and pipeline connection seal  in construction work equipment Serving brands Schwing, Putzmeister, Zoomlion, Sany,CIFA Name Concrete pump rubber seal Size DN50,DN80,DN100,DN125,DN150,DN180,DN200,from 2inch to 8inch other sizes upon clients¡¯ requirement Material Polyurethane, Natural rubber Hardness 20~90 Share A Color Black,or as your request  Special features high temperature resistance, good cold flexibility,  good resistance to acids and alkalis, weather and aging resistance Application Used in concrete pump truck,concrete pump and pipeline connection seal  in construction work equipment Serving brands Schwing, Putzmeister, Zoomlion, Sany,CIFA