The Titus AG-85 is a duct mounted butterfly damper used in round duct applications. Continuously adjustable from fully open to fully closed. Friction pivots hold the heavy gauge blades at the desired setting. Damper blades open upward into air stream. Not recommended for use with flexible duct. Adjustable at screwdriver operator slot

Curb Extension -Vented 33.5"X33.5"

Steel Single Deflection Return Grille with ¾” blade spacing, 35° fixed deflection, Blades parallel to the long dimension