Hart & Cooley 661 Series 10" x 8" White Ceiling or Sidewall Register (Fits a 10"W x 8"H Hole) Designed to fit a 10"W x 8"H hole; overall size is 11-1/4"W x 9-1/4"H All-steel construction; bright white finish; two-way deflection For heating or cooling; ideal for shallow duct installations 1/3" spaced fins set at 20 degrees; multi-shutter valve Interlocking valve louvers for positive shut-off