Adaptive Technologies MP-1.5NPS-TA - Sound Isolated Strut Adapter for 1.5 Inch PipeThe MP 1. 5NPS TA is a tube adapter that connects standard 1 1 2" sched 40 NPS pipes to channel strut. This adapter allows speakers and other objects to be mounted under channel strut using standard off the shelf 1 1 2" sched 40 NPS pipes. This adapter comes with a thick rubber pad and rubberized hardware to block sound and vibrations from traveling between the pipe and strut. Features: For overhead strut applications. Adapts to standard schedule 40