Sturdy Material : Made of high-quality Vulcanized Rubber, solid puck, good hardness and resilience, durable in use. Both sides are smooth and flat, easy for sliding. The surrounding dense dimple pattern creats great frition between the puck and hockey stick, our strict quality control guarantees every player can better handling the puck, helps you to get qucik pass and accurate shot. NHL Offcial Size : We used official standard size, diameter 3", thickness 1", Weight 6oz. Suitable for America, Canada and other internation competitions. Use it for daily practice, helps you to get into the groove on a real game and win it. The standard size puck is also suitable for teenagers who are over 8 years old, helps them to improve fast. Teenager and Puck : It's very important to cultivate children's interest in ice hockey in their early age, it can not only improve their physique, but also enhance their flexibility, upper body strength, ball sense. Children who play ice hockey have stronger sense of competition, and they are more willing to face and solve probelms when they're suffering setbacks. Choose our pucks, the international standard size helps them to find the feeling and adapt to the intensity of the game easily.