Diffuser Assembly; Type Ceiling; Deflection 1-Way; Overall Dimensions 9-1/2" Length x 7-1/4" Height; Material Polymer; Inclusions/Features Small Grille, Integral Damper, Square Damper Handle, Strap; Air Flow Capacity 55-200 CFM; Hole Diameter 7.25"; Duct Size 4"/5"/6"; Maximum Ceiling Thickness 1.25"; AK Factor 0.17; Weight 10.5 Lb; Packaging Quantity 8 per Carton