The Light Source MP1.5B.5M Mega Coupler Pipe Adapter for 1.5" Pipe (Silver)The Pipe to Coupler Adapter can be used to rig pipe mounted plasma screens, projectors and speakers from overhead pipe or truss. Special versions are available with cable holes through the side to run power and signal cables inside the vertical pipe. The Pipe to Coupler Adapter attaches a standard threaded 1 1 2" pipe (1. 9" OD) to a Mega Coupler. There are two interlocking tabs to keep the adapter from rotating. The Adapter is fastened to the Mega