The Kupo KHS-112 Butterfly Frame for Schedule 40 Truss Pipe is made with 1.5mm thick steel and a chrome-plated surface treatment. It contains corners, connectors and ears that offers the ability to make butterfly frames in desired sizes with standard size pipe included 1-1/2'' (38.1mm) or 1-1/4'' (31.8mm).

Features
Steel ring welded on the corner to enhance the stability of frames by strings.
Steel boss welded on the tube to maintain the long-lasting operation of knobs.
Two drilled holes on the corner for checking if the pipe is securely tighten by the knob.