Photo 1 of Generic Boxing Speed Ball Featuring a Universal 8mm Screw and a Replaceable Spare Sandbag for Dynamic and Enduring Training Sessions (Black Gold), JR-0135

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Photo 1 of Generic Boxing Speed Ball Featuring a Universal 8mm Screw and a Replaceable Spare Sandbag for Dynamic and Enduring Training Sessions (Black Gold), JR-0135Photo 2 of Generic Boxing Speed Ball Featuring a Universal 8mm Screw and a Replaceable Spare Sandbag for Dynamic and Enduring Training Sessions (Black Gold), JR-0135