Size - 48.6mm/60.6mm Material - Q235 Technology - Pressed/Forget/Casting Standard - BS1139 Performance - Anti-rust,skidproof,high breaking strength. Character - Durable finish,reliability,low maintenance,corrosion resistance high tensile strength. Size mm inch 48.6x48.6 1-1/2x1-1/2 48.6x60.6 1-1/2x2 60.6x60.6 2x2 Scaffolding Fixed Coupler Size mm inch 48.6x48.6 1-1/2x1-1/2