Our mounting frames are designed to make installing grilles, registers, and diffusers in plaster and sheetrock fast and easy. Creates an attractive appearance for registers, grilles, and diffusers in plaster installations Adjustable fastening clips adapt to a variety of plaster and sheet rock ceiling thicknesses All Aluminum Construction British White Powder Coat Finish Mounting Hardware Included. 1'x1', 1'x2', 2'x2', 2'x4' available.
Rough openings cut to;
1'x1' cut rough opening to: 12-1/4" x 12-1/4"
1'x2' cut rough opening to: 12-1/4" x 24-1/4"
2'x2' cut rough opening to: 24-1/4" x 24-1/4"
2'x4' cut rough opening to: 24-1/4" x 48-1/4"