Coaches of eager yet inexperienced throwers will find this Black Rubber Discus-Practice 1. 6K is a great learning and training tool for middle school and high school athletes. The affordable price means you can purchase several for your program and let the kids create their own competitions. You may even discover a new champion discus thrower among the students in the track-and-field unit of your P. E. class. Affordable hard rubber discusExcellent for training at the high school or middle school level.