Rodent Guard, Includes 6 Units, Keep Rats Out, for 2" X 3" Downspout Easy to install - slide base on the downspout, fasten with one rust proof self-tapping screw (provided). Easy to clean - No tools required! Snap off the front, clean the leader, snap the front back on and it locks into place. Features - Patented, cosmetic and effective design. Made of ultra-tough Polycarbonate - doesn't rust, discolor from chemicals, fade in the sun or deteriorate. Only available in white. This is the Small Rodent Guard which fits on standard 3" downspouts; see other page for large Rodent Guard which fits on 4" downspouts. Green - No messy or hazardous baits, traps or poisons.