One-way ceiling or wall steel air register w/multi shutter valve (10 x 6) (duct opening size) All Steel Construction with 1 way deflection with outside dimension 11.75"wide and 7.75" tall 1/2 inch blade spacing for high air flow Built in damper with durable steel handle for easy open and closer Matte white powder coating finish Individually shrink wrapped to protect the surface from scratching