Bucking Unit manufacturer / supplier in China, offering Heavy-Duty Hydro Tester Gsy273: 100t Weight & 145psi Fluctuation Control, API Casing Hydro Tester Gsy273: Soft Contact for Duplex/Superduplex Pipes, Dual-End Hydrostatic Tester Gsy273: Plain/Coupling Sealing & ± 1.0% Deviation and so on.