National Hockey League License Designed for use above 32° No-bounce high density molded PVC ball The Franklin Sports NHL (National Hockey League) Official Size (2 5/8 inch) High Density Street Hockey ball is designed for warm weather use, above 32 degrees Fahrenheit. The ball is assorted with extreme colors (Blue, Orange and Green) which are both fun and practical as players can easily keep an eye on the ball during the game. They are made of a no-bounce high density molded PVC.