Inner Joint Pin 1.weight:570g 2.thickness:2.5mm 3.size:48.6mm 4.surface:golden/silver zinc galvanized Scaffolding Coupler - Inner Joint PinSize48 ... coupler, plank coupler, sleeve coupler, joint pin, single coupler, etc.+We also provide standard, ledger, transom, scaffolding ladder, adjustable u-head, universaljack, base ...