We are an online retailer that sells decorative floor registers and wall registers. Most of our heat registers and cold air returns are manufactured by Decor Grates and are of utmost quality and selection. We also have a fantastic price for all our floor registers and grilles. If there is something that you don't understand or want to inquire about, please feel free to call our educated customer support line and they can fill you in on all the intricacies of any air register in the store. Please take a look around our shop, find out what are the grill sizes and designs available and how do they match your floor and duct openings. Make sure you have the right choice of floor register and than buy it right here online. Best regards Have a great day!