DJ Lighting T bars. 2 are regular plastic one is a custom metal one I had made because I wanted it to be indesctructable :). Works well, goes on top of your light stand to hold up to 4 lights. Condition is Used. The T joint themselves will accept a one and a half inch pipe and the bars that the lights bolt to are also 1 1/2 inches outside. 3 T bars total, 2 plastic, 1 metal.