6 Inch Adjustable Pattern Screen Grille Cover Louver Round Air Vent 2 Pack

Color: White, Black Material: ABS Plastic Fit for Hole Dia.: 150mm / 6" Bottom Dia.: 142mm / 5.59" Total Size: 198mmx76mm / 7.8"x2.99" (D*H) Package Content: 2 x Round Air Vent How to use it? Easy to use, make sure the black sleeve is inserted into the wall or ceiling hole and rotate it. Then the air vent will fix on the wall. What should I notice? 1. Please check your wall or ceiling mounting hole diameter before buying. 2. Not for the floor, only for the wall and ceiling.