Applicable scenarios: other ball games Color: 12 pounds resistance model silver (adjustable resistance),12 pounds resistance model black (adjustable resistance),12 pounds ordinary model silver (no resistance),12 pounds ordinary black (no resistance),8 pounds resistance Silver (adjustable resistance),8 pounds resistance Black (adjustable resistance),18 pounds heavy silver (no resistance),18 pounds heavy black (no resistance),10 pounds resistance Silver (adjustable resistance),10 pounds resistance Black (adjustable resistance) Material: spring steels
