StealthFlow 24 in. Extender Vinyl 24.5-in Black Downspout Extension. Model # 4622. Find My Store. for pricing and availability. 124. Compare. Amerimax. FLEX-A-SPOUT Vinyl 24-in White Downspout Extension. Model # 85510.Genoflex, universal, green, downspout extension, diverts water away from foundations & prevents erosion, installs without tools & fits both 2" x 3" & 3" x 4" downspouts on 1 end, connects to PVC sewer & drain pipes, sdr35 drain pipe, corrugated sewer & drain pipe & flex drain, bendable, flexible, & expandable, expands from 19" to 55".> There are simple plastic downspout extension. They have two different sized ends, and just slip on, 2"x3"and 3"x4", male and female, 2"x3" and male, 3"x4" and male fit downspout perfectly. > They are long enough to get the downspout water out some distance from the side of the house.Downspout Extension that diverts water away from the foundation. It will also fit into standard drain tile. Multiple Downspout Extensions may be linked together through a snap-lock system. 2"x3" Downspout, 3"x4" Downspout, Round Downspout, Drain Tile.