We are offering projector accessories plates. cma100 8" (203 mm) ceiling plate with adjustable 1.5" npt column, black a universal ceiling plate solution for most structural ceiling installations. features allows you to quickly and easily achieve the correct drop distance, 24.25-46" (61.6-116.8 cm) provides unmatched rigidity with four set screws (included) also available with 2" npt column (see cma260)