Special Lite Products LB-8054-DBL Light Block - Double Fits 5-Inch Dutch Lap Siding, White The simplest way to attach a lighting fixture to siding Made of durable polyurethane Can be painted or stained to match desired color For use with switch box or outlet box by removing recess Inside: 4" diameter or 2 1/2"w x 3 1/2" h. Outside: 12" x 8" Fits 5" Dutch Lap Siding