this is coupler,base part in scaffolding system,for connecting 2 pipes demension is 48*48 ... . Our products include scaffolding systems ,such as cuplock,layher,plettac,ringlock,kwik-stage,frame,guardrails and accessories,couplers, formworks, barriers, ... price.this is coupler,base part in scaffolding system,for connecting 2 pipesdemension is 48*48,48*32surface :ecolor galvanized scaffolding couplers