Fits 8x4 Duct Opening 2 Way Steel Air Supply Diffuser by Handua Register Vent Cover Grill for Sidewall and Ceiling White Outer Dimensions: 9.75" X 5.75"

❗⚠️ [𝗜𝗠𝗣𝗢𝗥𝗧𝗔𝗡𝗧] ⚠️❗HOW TO MEASURE - Always measure the duct opening to determine which size you should order. Duct Opening Size = Listed Size. If the hole on the wall or ceiling is 8" W x 4" H please order the 8x4 size option. The outer dimensions of the vent cover are 1.75" wider. FIXED 2-WAY FINS WITH VOLUME DAMPER - This 2-way grille sends air in two directions through louvered fins fixed at 40 degrees; the fins do not move. The built-in back damper sets how much air comes through, from fully open to fully closed. It controls volume only, not direction. HIGH-QUALITY MATERIALS - Made of high quality steel with durable powder paint coated, the ceiling register vent cover is built to last and withstand daily use. The steel is stamped so there is no sharp edges. It is noise free product. VERSATILE APPLICATION - Handua 2-way register vent used for sidewall or ceiling openings. Using our HVAC vent cover within your ventilation system will improve your home circulation. EASY INSTALLATION - Installing this metal air supply register grilles is a breeze, with simple, hassle-free mounting options and included screws. Enjoy a quick and straightforward setup to enhance your home's ventilation.