Rainfilter Green Gutter Filtration 100% Green Features and Benefits: Each carton cantains 6,4-foot sections, 24 Linear feet per carton. Fits inside any 5-inch K-style gutter. Simple to install. No hardware or additional tools required! Prevents mosquitoes and other insects from bredding in gutters. Protects your home from foundation problems, basement leaks, rotting windows, and fascia boards. Contains biocide and fungicide that inhibits the growth of mold, mildew, fungus, algae, and moss. Contains protective UV coating to protect from damage from the sun. Environmentally friendly green product. Withstands heat, ice, and snow. Independent laboratory tests have proven RainFilter as a superior Gutter Filtration system.