GutterStuff, 5 inch x 48 inch K-Style Foam Gutter Filter, Invisible From The Ground, Eliminates Dangerous and Dirty Gutter Cleaning, Simple Installation In Minutes, No Special Tools, Fits Completely Inside Any 5 inch K Style Gutter The Most Common Style and Size, When You Reach A Corner You Make A Miter Cut Using A Scissors Or A Knife, Seals Out Leaves While Allowing Large Volumes Of Water To Flow Through Quickly, Keep Debris From Entering The Gutter, Made From Polyether Outdoor Durable Foam, Won foot t Crumble, Dent, Bend Or Cave In, Allowing For Satisfied Customers, Also Prevents Mosquitoes From Breeding In The Gutter.