This Gill Indoor Rubber Discus features a one-piece solid rubber construction that won't scuff gym floors or walls. This discus is great for practicing a thrower's form and power techniques, as well as for use in competitions allowing rubber discuses. This rubber discus is offered in a women's weight of 1.0K, a high school boys' weight of 1.6K, and a men's weight of 2.0K. The Gill Indoor rubber discus meets NFHS specifications.