Product Name: concrete pump rubber seal/gasket/ring Material: Polyurethane, Natural rubber,TPU Size: DN50-DN200 Color Black,white,yellow etc Matched with pump pipe/clamp, Used in concrete pump truck,concrete pump and pipeline connection seal in construction work equipment. Concrete pump gaskets, which can be divided into different size, like DN80, DN100,DN125,DN150,DN175,DN200 and so on. It has high pressure series and