The Bird•B•Gone Bird Slope is a humane way of deterring birds from landing and nesting on ledges, eaves, and other roof top areas. The pieces fit to into the eaves to create a 90° angle making it impossible for birds to land on it. These 4' long extender pieces are sold in 48' packs and comes in a standard gray color, but can be ordered in stone color upon request. They are made from u.v. protected outdoor grade pvc plastic. Additional parts are available for sale as well. These pieces attach to the regular slope pieces to cover larger spaces.