50lb. Selectorized Weight Stack Upgrade Weight Set Arm and Biceps this high-performance gym attachment ensures

this high-performance gym attachment ensures smooth

this premium lat bar ensures smooth motion and maximum resistance control for upper body strength training

and back muscles while building functional strength

and spring collars to ensure a secure and effective workout

50lb. Selectorized Weight Stack Upgrade Weight Set Arm and Biceps this high-performance gym attachment ensures50lb. Selectorized Weight Stack Upgrade Weight Set SP50 Adds 50 Pounds to your existing stack Take your existing selectorized weight stack to a new level of performance! Fast and simple installation make this a must have for your selectorized plate load system. Upgrade stack does not include a top plate or selector rods or pin. Multiple upgrade stack configurations are available, as are premium plates. The Upgrade Stack cannot be used independently.