Registers Baseboard Diffuser Baseboard Return Butterfly Damper Curved Blade Duct Ring Floor Register Floor Return Horizontal Return Air Filter Grille Return Air Filter Grille 1/2" Spaced Fins Return Air Filter Grille 1/3" Spaced Fins Round Ceiling Damper Round Ceiling Diffuser Sidewall & Ceiling Register T-Bar Fixed Pattern Diffuser 2-Cone T-Bar Fixed Pattern Diffuser 3-Cone T-Bar Plaque Diffuser Toe Space Grilles Wall Return 1/2" Spaced Fins Wall Return 1/3" Spaced Fins Wall/Ceiling Register 1/2" Spaced Fins Wall/Ceiling Register 1/3" Spaced Fins