This training aid really works. Installs without tools on any goal to reduce shooting target from normal ring's 18" diameter to 16". This 20% reduction in area will train the shooter to hit a smaller target. Normal goal looks like a great big bucket during games. A must for developing players to dramatically increase their shooting percentage. Fits residential goals, too. One-year limited warranty. Approx. shipping weight: 4#; Sm. Pkg.