manufacturer for various scaffolding couplers Putlog Coupler-forged and pressed type material :SPHC / Q235 Putlog couplers 1,material :SPHC / Q235 2,Standard:EN74 3,for tube o.d. 48.3mm x 48.3mm 4,thickness: 5mm 5,weight: 0.65kg 6,surface treatment: zinc plated, yellow passivated7.Color: White, Yellow 8,good bearing capacity,durable & stable pressed Putlog Coupler