NISHI (Nishi Sports) Track and Field Discus Rubber Weight: 1.0 kg Material: Elastomer Made in Italy Can be used in the gymnasium during rainy weather, night practice, and winter practice. I am actually using it. I purchased several, but I no longer need them, so I am selling them. I only opened the package for the photos, and they are unused. They will be simply packaged and shipped via Yu-Packet.