Schwing Concrete delivery pipe with twin wall 45Mn2, 20#,Q235 Brand: Schwing, PM, Sany, Kyokuto Cubic: ... pump delivery pipe, rubber hose, elbow, bend, reducer, coupling, cleaning ball, piston, cylinder, eye-glass plate, cutting ring, concrete placing boom ... HD/ZX-6inch F/MOthers Schwing Concrete delivery pipe with twin wall