Dog Ball, K9 Ball, Solid Rubber Ball on Rope for Reward, Fetch, Play Made in Europe, favored by many trainers, K9 handlers and professionals Great for Schutzhund, IPO, PSA, Police & Military K9 Training Sizes to fit medium to large dogs, available in 60mm (6 oz) or 75mm (11.5 oz) Hard solid rubber for long lasting use of the reward, not as easy break as tennis ball Extra long rope for your own adjustment, bright colors