Using a North American standard 1.5" NPT pipe, the MI-20146 interface bracket is compatible with various extension poles and ceiling plates. Whether the installation required is on a flat or pitched ceiling, the PRB-20-H interface bracket provides endless possibilities for customization. Manufactured using high-grade steel, for durability and strong support for projectors up to 35kg/77lbs. A quick release function allows the projector to be installed in a few minutes and removed for maintenance without having to re-align the projector. Multiple adjustments provide the best projected image for the optimum viewing experience.