Architectural Grille 102251406 AG10 Series 2.25" x 14" Solid Aluminum Fixed Bar Supply/Return Air Vent Grille, Antique Bronze Finish The AG10 Series: extruded solid recycled aluminum bars with weld-lock construction for maximum durability. These 'drop-in' bar grilles are easy to install and ideal for HVAC applications in residential/ commercial locations 0 Degree Deflection Easy 'drop-in' installation - no tools required Weld-Lock constructed for maximum durability Made of 90% post-consumer recycled solid aluminum Fixed bar/blades allow for maximum airflow Pencil Proof: 1/4" spacing between bars