Tidy Gutter, uncoated foam filter gutter insert is a flexible, affordable foam gutter filter made from polyether outdoor durable foam. Tidy Gutter inserts can be easily and quickly installed into any 6-Inch K-style gutter. Perfect for the do-it-yourselfer, the only tool necessary is a pair of sheers or a knife to miter cut the foam at corners for optimal water flow. This lightweight product won"t crumble, dent, or cave in and is effective at keeping debris from entering the gutter. The foam"s main structure contains a germicide, fire retardant and UV stabilizer. 3 Year performance warranty.