Our 2 x 12 contemporary style floor registers have a 3mm thick steel core meaning that these registers offer strength and durability as well as the simple beauty of their modern design. The plated antique brass finish is protected by a clear lacquer coating and will blend well with most types of flooring. For easy regulation of heated and cooled air there is an adjustable steel damper which will fit in any duct hole that measures 2" x 12". The overall size of the top of the register will measure 3 7/16" x 13 3/16". By adding wall clips to your order you will be able to convert these floor registers into wall registers, allowing you to match your floor and wall registers for a look that really ties a room together.