12 x 6-Inch White Sidewall Return Air Grille Category_Caulk & Sealant The blade's ultra-hardened cutting edge

The blade's ultra-hardened cutting edge delivers up to 4 times longer life than those of standard blades

Covered keyway for maximum weather protection

Use it to control brown patch

Ceramic fortified for the ultimate in waterproof protection

& Ceiling Tile

12 x 6-Inch White Sidewall Return Air Grille Category_Caulk & Sealant The blade's ultra-hardened cutting edgeAmeriflow grilles, registers and diffusers offer quality material, skilled workmanship and sound engineering. For heating and air conditioning systems in residential and light commercial applications, for new constructions and remodeling. Ameriflow products are quality built with the contractor in mind.