U head Jack base 1. Solid or Hollow Tube 2. Dia 32, 34, 36, 38,42mm...500mm-700mm 3. Surface: Electro galvanized, HDG U head Jack base 1. Type Solid and Hollow Screw Base Jack2. Material: Q2353. Surface: Electro or Hot dip galvanized4. Tube Size: Dia 34, 36, 38, 40mm, 42mm*600mm,5. U Head size: 200*120*50*4mm thick