Adaptive Technologies MP-150-115-CM - Ceiling Plate for 1.5-Inch Schedule 40 PipeThe MP 150 115 CM attaches audio and video mounts to flat ceiling or structures. This ceiling mount assembly accepts a standard 1 1 2" 11. 5 NPT pipe. With the added reducer bushing adapters, it accepts _ 14 NPT and _ 13 threaded rods. The MP 150 115 CM is designed to hold overhead speakers with a maximum weight of 454 lbs. Features: For overhead audio and video applications. Adapts to standard schedule 40 1 _" pipe and to schedule 40 _" pipe (using