Airtec 1' X 1' 4 Way White Plastic Grille with Damper. No collar on the back.
GRD grille/damper for low-clearance side/top entry use. Same construction as standard diffusers but no boot. Comes in all five grille styles & Retro. For residential/light commercial use, designed for 1-man installation only working below a ceiling. MPN: 81944
Mounting Clip accommodates thicknesses up to 1-1/4"
Virtually airtight butterfly damper Rubber gasket delivers superior seal when closed.
Actual Outside measurements of the faceplate are 11.25"x 11.25".
Damper Handle allows smooth, easy turning adjustment from below for fully open to the tightly closed position
Manufacturers Part # 81944 or GRD4
High-Grade Polymer Grille resists breakage, scratching, yellowing and fading.