... of our products: we produce and supply concrete pump parts(fitting to Schwing and PM , Sany, ... :90, 60,45,30,15 3. concrete pump coupling/clampmaterial:Hi-Mn13,20#steel,etcsize:from ... rubber sponge balls:for all kinds of concrete pump pipefittings 7.wear plate and cutting ring ... 20m, 21m, 24m, 28m hydraulic concrete spreader and manual spreaderintegrated hose end and inner wall hardened, prolong working ...