... :470g 3.thickness:3mm 4.surface: golden/silver zinc galvanized Plank ClampSize48.6 mm, Square or CircleWeight470 gramsThickness3 mmMaterialPressed Steel/Q235Surface ... coupler, swivel coupler, fixed/swivel beam/grider coupler, putlog coupler, plank coupler, sleeve coupler, joint pin, single coupler, etc.+We also ... can be golden/silver zinc galvanized or hot dipped galvanized. Plank Clamp