... from 2''-8'', snap clamp, bolt clamp, screw clamp, used for Schwing, PM, Sany, CIFA, etc. nameClamp Couplingsize2inch----8inchTypeSnap clamp, bolt clamp, screw clamp, wedge clampSurfacePainting or GalvanizingTechnicalprecision ... brandSchwing, PM, CIFA, Sany, Zoomlion and so on concrete pump bolt clamp