... :pressed steel/Q235 4.surface:golden/silver zinc galvanized Sleeve Coupler Size48.3 mm or 1 1/2"Weight1000 gramsThickness3.5 mmMaterialPressed ... /fixed coupler, swivel coupler, fixed/swivel beam/grider coupler, putlog coupler, plank coupler, sleeve coupler, joint pin, single coupler, etc.+We also provide standard, ledger, transom, scaffolding ladder ...