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. Made Of Durable, Lightweight Outdoor Polyether Foam. Does Not Require A Contractor Or Special Tools. Includes A UV Stabilizer And Germicide. Filter Is Non-Absorbent, Allowing Water To Run Through.