RectorSeal 81914 AirTec MV4 Ceiling Diffuser with 4-Way Grille

The RectorSeal AirTec 81914 is a plastic ceiling diffuser with incorporated ceiling box. For residential/light commercial use & offered in 8"x 8" square, 6x6" square, & 6" and 8" round. Designed for 1-man installation only working below the ceiling, they offer convenience & speed. Features Stepped Collar for multiple duct sizes, Collar tabs easily tear away unneeded sections and Mounting Clip accommodates thicknesses up to 11/4" Virtually air tight butterfly damper Rubber gasket delivers superior seal when closed Damper Handle allows smooth, easy turning adjustment from below for fully open to tightly closed position High Grade Polymer Grille resists breakage, scratching, yellowing and fading. Patented one piece grille, damper box and Lightning fast installation