... , the towed concrete pump, Concrete placing boom series.3, Concrete pump truck fittings : Wear plate and wear ring, S valves, Concrete pump piston , delivery cylinder,.ect4: Concrete pump clamp ... : DN80, DN100,DN125,DN150 Casting pipe clamp and Forged clamp.5, Other accessories: Rubber hose , Cleaning ball , Sponge plug, Seal ...