We have fixed coupler,joint coupler,swivel coupler with different weight. We have fixed coupler,joint coupler,swivel coupler with different weight. If you are interested in ... ) material :casting malleable iron 2)weight:0.85-1.2kg 3) surface:painted or self-colore 4)hight qualityswivel scaffolding coupler,scaffolding swivel coupler,coupler manufacturer scaffolding coupler