Sold by pairs, the CLIMBING BALLS 80 mm are great tools for increasing grip strength and strengthening your arms during pull-ups! They improve clamp grip strength and coordination for better climbing performance! The CLIMBING BALLS are suitable for both beginners and the more experienced. Made from recycled rubber wood, their soft feel and grip will make them essential tools during your workout. Weight : 180g/unit Dimensions : 80 mm diameter Weight : 355g/unit Dimension : 100mm of diameter Weight : 600g/unit Dimension : 120mm of diameter