InFocus Adjustable Ceiling Mount Extension Arm, 6" - 9": * Extends the projector mount 6" - 9" below the ceiling fixture * Adjustable column * For use with Ceiling Mount PRJ-MNT-UNIV * Requires Ceiling Installation Plate PRJ-CEIL-ADPT * Notched design for adjustment without disassembly * Includes set screw for add stability * Consists of 1.5" NPT column, threaded on both ends