... :48.6mm 4.surface:golden/silver zinc galvanized Scaffolding Coupler - Inner Joint PinSize48.6 mm or 1 1/2"Weight570 gramsThickness2.5 ... /swivel beam/grider coupler, putlog coupler, plank coupler, sleeve coupler, joint pin, single coupler, etc.+We also provide standard, ledger, transom ... can be golden/silver zinc galvanized or hot dipped galvanized. Inner Joint Pin