Keeps debris from entering the gutter. Truncated feature will keep leaves out and prevent ice and debris from entering in the back of the gutter. Does not lose support, bend or sag. Fits completely inside any 5" K style gutter - the most common style andsize on the market for residential homes. Made of durable, lightweight outdoor polyether foam. Installed by inserting a section into a standard gutter and sliding it under the straps. The insert fits snugly and is invisible. Insert can be cut with scissors or a knife at a corner, if needed, and installation is complete. Does not require a contractor or special tools. Includes a UV stabilizer and germicide. Prevents mosquitoes from breeding in the gutter. Filter is non-absorbent, allowing water to run through. Pore size allows the smallest particles to pass through and keeps the larger particles on top to blow off.