Optimize your 21-Day workouts with extra Smarthockey Training Balls and eliminate time spent looking for your ball while you work on your off-ice skills development exercises. The Smarthockey Training Ball is the only off-ice training device that matches the bounce, weight, height and slide of an ice hockey puck. The Smarthockey Training Ball is recognized as the #1 off-ice training ball in the world and can be found in the locker rooms of over 22 NHL teams, 30 European National and Pro teams, 50 US Men's and Women's Division I College teams and numerous Major Junior teams. <p>Patented 2-piece ball technology combines Surlyn shell with high-density, low rebound space-age thermoplastic core to give training ball the exact feel of an ice hockey puck.</p> <p>Solid core covered by the surlyn shell eliminates any pliancy or "smushing" of the ball between the stick and the skating surface whether you're training on a tennis court, basketball court, paved street, driveway or down in your basement.</p> <p>Slightly lighter than an ice hockey puck to compensate for the extra friction of off-ice surfaces; difference in weight makes the ball "feel" like a puck, which makes it perfect for developing lightening quick hands for puck control, shooting and passing.</p> <p>Diameter of ball is 2.1875 in, making the height at which it contacts the stick 1.09 in, which is less than one tenth of an inch higher than an ice hockey puck.</p> <p>Dropped from a vertical distance of three feet a frozen ice hockey puck and the smart|hockey stickhandling and shooting ball only bounce 11 in.</p>