Q235 Base Jack, U-head, Universal Jack Solid Jack: 30, 32, 34mm Hollow Jack: 34, 36, 38mm Surface: Painted, galvanized Adjustable JackMaterial: Q235Base Jack, U-head, Universal JackSolid Jack: 30mm, 32mm, 34mmHollow Jack: 34mm, 36mm, 38mmSurface: Painted, Electro Plated, Hot dipped GalvanizedAny length is availableSome popular sizes for reference:Jack BaseBase PlateM30(solid)*600mm120*120*4mmM32( ...