The pear-shaped Speed Ball Punch is made of high-quality, durable leather, Soft and durable with a butyl rubber interior for strength, speed and durability. This leather speedball punch features heavy-duty double stitching for durability. Reinforced hand stitching, rivets and layers are absolutely unbreakable. Double thickened braces for long hanging. Weighing 185 grams, this leather speedball boxing box is pear-shaped for precise rebound, balanced and centered for predictable and consistent rebound. This leather speedball bag has inflatable side valve, which is leak-proof and not easy to carry. Comes with a metal gas needle and inflator for inflation. Leather Speedball Sandbag Improve your hand speed or improve your cardiovascular condition with this premium speedball. Can be used for boxing, sanda, kickboxing and home fitness.