adjustable coupler Thickness: 5mm, Scaffolding coupler Standard: in line with JG3061-1999 Size: 48mm*48.3mm, adjustable couplerModel: GKU48ASize: 48.3mm*48.3mmStandard: reach to JG3061-1999N.W:1.02kgThickness: 5mmProduction process: HydraulicSurface: Electro galvanization adjustable coupler