Fits 24x6 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 25.75"W X 7.75"H (24" W x 6" H Duct Opening) The Listed size 12"x24" is

The Listed size 12"x24" is for inside duct opening measurement

Size selection guide: 1) take the vent cover off the wall or ceiling

Easy adjust air flow control with central lever

The Shark Industrial faucet connector features a 3/8-inch comp x 1/2-inch FIP nut connection

This added protection extends the lifespan of the connector while maintaining dependable performance in demanding environments

Fits 24x6 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 25.75"W X 7.75"H (24" W x 6" H Duct Opening) The Listed size 12"x24" isThe Listed size 24"x6" is for inside duct opening measurement, actual outside dimension is 25. 75"x7. 75" Stamped Face Steel Construction with 1 2" fin spacing for high air flow applications. Screws are included for easy installation White Powder coating with matte finish Individually packed with cardboard box for ultra protection