A plastic ceiling diffuser with incorporated ceiling box. For residential/light commercial use and offered in 8 x 8 in square, 6 x 6 in square and 6 and 8 in round. Designed for 1-man installation only working below the ceiling, they offer convenience and speed.

• Stepped collar for multiple duct sizes, collar tabs easily tear away unneeded sections and mounting clip accommodates thickness up to 1-3/4 in
• 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 1-piece grille, damper box and lightning fast installation
• Less restriction in airstream
• Aerodynamic leading edges
• High-effective free area
• Plastic gives higher R-value
• 1-piece heat-resistant faceplate
• 1-size takes flexible or rigid duct
• Damper adjusts through face with flat blade screw driver
• Easy tear-off tab to increase collar size
• Integral ceiling clamps facilitate installation and eliminate gaps
• No metal parts except screws
• Screw heads are zinc-plated and powder coated for maximum durability
• Damper mechanism incorporates anti-strip feature
• Formulated to resist yellowing from exposure to sun, heat or fluorescent lights
• Scratch-resistant

• Catalog https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS22745_Cat.pdf