PM screw clamp for concrete pump 1.forging 2.40CR(ASTM ... or Galvanizing 4.service life is long 2-3 t PM screw clamp for concrete pump TypeSnap clamp, bolt clamp, screw ... and intoApplicationConnection of Concrete pump and pump truck pipelineUsed forSchwing, PM, Kyokuto, Sany, Zoomlion,Ihi, NiigataSize4inch-6inch other sizes and types ...