2 Pack Air & Heat Deflector for Vents Sidewalls and Ceiling Registers

【DESIGN】Unique two part expandable design, made of High transparent unbreakable plastic. 【FEATURE】Fastens securely to metal duct surface with two (supplied) strong magnets. Redirects air for added room comfort and increased system efficiency, saving energy. You can also use the screw slots so there are 2 options for secure mounting. 【INSTALLATION】Adjust the deflector to fit the vent and position magnets to keep the unit in place. Try to press magnets(supplied) to bottom until it touch your vents, the magnets will hold down firmly. 【UNIVERSALITY】It's suitable for common 4x10 Inches, 4x12 Inches, 4x14 Inches, 6x10 Inches, 6x12 Inches, 6x14 Inches and the vents which length short than 16in or width more than 3.5in. The magnets can be fixed in a variety of metal vents and metal deflector vents (not suitable for wood and plastic vents).