Building Supplies

18" x 18" 2-piece. Base is fully compatible with all siding profiles. Install the base with the siding and snap on the cover later. Ventilated opening: 10" x 12-1/2". Outside unit dimensions: 18". Net free area: 46.3 sq. in. Siding receiver 5/8" to 1-1/4" in 1/8" increments. No. RDGV18 PW: White No. RDGV18 PA: Almond No. RDGV18 EQ: Gray No. RDGV18 PC: Clay No. RDGV18 A7: Tan No. RDGV18 PB: Cream No. RDGV18 EX: Beige No. RDGV18 BI: Mist No. RDGV18 ED: Flint No. RDGV18 PP: Pearl... » read more