IMPERIAL MANUFACTURING RG0223 3X10 White floor register

White floor register is manufactured from an all steel construction combined with durable, powder-coated finished, painted metal registers providing dependable, long lasting use. Features a rolled fin for superior strength and safety with an easy to operate damper control ensuring hassle-free use. Efficiently produces widespread air diffusion. To determine the inside dimensions, simply measure the length and width of the opening then Subtract 1/8 to (depending on how square the opening is).