2-piece mounting block for vinyl and aluminum exterior siding. Offers 1" diameter and a 2-3/8" x 3-3/4" rectangle knockout. 7" x 7" wood grain texture surface with 7-1/2" x 8-1/2" flange dimensions. Provides a flat surface for installation of light fixtures, receptacles, dryer vents, weather heads, and water faucets. Use on new initial applications. Will fit most siding. Hard, durable plastic. No. BLOCK PW: White No. BLOCK PA: Almond No. BLOCK EQ: Gray No. BLOCK PC: Clay No. BLOCK A7: Tan No. BLOCK PB: Cream No. BLOCK EX: Beige No. BLOCK BI: Mist No. BLOCK ED: Flint No. BLOCK PP: Pearl