Thermwell Clear Plastic 10" to 14" Adjustable Length, Heat & Air Deflector for Vents

Thermwell Clear Plastic 10" to 14" Adjustable Length, Heat & Air Deflector for Vents Designed for central forced air systems Unbreakable, clear plastic construction Features a magnetic hold for easy installation Multipurpose use for floor, wall, and ceiling vents Adjustable from 10" to 14" to fit various vent sizes Improves heating and cooling efficiency