The Cedar Impressions Staggered Rough-Split Shakes Siding is a staggered edge design that creates a beautiful, classic appearance found on the most distinctive homes. The shingles include fastening indicators, reinforced nail slots, molded perimeter lock, rough-split, hammertapper, STUDfinder, temperature lines, and a patented PanelThermometer to ensure easy and precise installation. CertainTeed Vinyl Siding offers an industry-leading spectrum of colors including unique darker shades and semi-transparent stained colors for virtually unlimited design possibilities. Designed with TrueTexture technology, these shingles replicate the look and feel of real cedar by digitally capturing textures from actual wood. In addition to the exceptional looks, they resist the damaging effects of most weather and yet require very little maintenance. This CertainTeed Vinyl Siding is manufactured with a flame spread index of less than 25 and is in compliance with IBS, IRC, Florida Building code, and National Building Code of Canada. Design: Double 9 Inch - two 9 Inch sections that snap together for a total of 18 Inches. 1 Inch Panel Projection (Accepts 1 Inch J Channel Only). Siding Thickness: .125 Inch Thick. Siding Length: 57 Inch. Siding Width: 18 Inch. 7 pieces of siding in a carton. Made of injection molded, durable polymer.