Hart & Cooley 661 Series 12" x 4" White Ceiling or Sidewall Register #010821 (Fits a 12" x 4" Hole) PLEASE NOTE: This fits a 12" x 4" hole; overall size is 13-1/4"W x 5-1/4"H. Bright White finish; For heating or cooling; Ideal for shallow duct installations. Two-way deflection; 1/3" spaced fins set at 20 degrees. All-steel construction; Used for ceiling or sidewall installations. Multi-shutter valve for positive shut-off; 1-5/8" depth when fully opened.