Direct central forced air and save money on heating and cooling costs with a deflecto Adjustable Sidewall Register Air Deflector. It adjusts to fit metal floor registers from 10" to 16" wiide. Suitable for both central air heating and cooling applications, this air deflector helps direct forced air in the direction you want for added comfort around the home or office. Clear, durable plastic design features built-in magnets and molded screw holes to help secure the air deflector to the sidewall register.