Convenient 4-pack of AGH412-RB Gothic Floor Register for a cohesive look throughout your home; 4x12 Inches size with a Rubbed Bronze Finish finish enhances airflow while complementing your decor Easy to install - Just drop into vent - no tools required Metal damper boxes rust and seize up, so we make our damper boxes with recycled high impact polystyrene; this is not a cheaper option, it’s the best option. Available in a variety of styles and finishes to match any decor Filter retainer and filter are sold separately