Shoemaker 955-12X4 12"x4" Adjustable Blade Baseboard Register - White 955 O - Steel Opposed Blade Damper All Component Parts, Rivets, Linkage And Handle Enclosed In Valve To Assure Trouble-Free Operation Countersunk Mounting Holes For Flush Appearance, With Color Matching Phillips Posi-Drive Screws Extruded Aluminum Frame With Steel Roll Formed Blades And Steel Multi-Shutter Damper