9.9-19.8 LB Capacity Heavy-Duty Zero Gravity Balancer. Tapered drum spring balancer for production use. The tapered drum minimizes tension build-up as the cable is extended. Ideal for small assembly operations. Zero gravity balancers are designed to provide a consistent resistance when the operator pulls against the loaded balancer. Ideal for jobs where reel style balancers fail. - Externally adjustable. - Cast aluminum construction - 3/16" diameter steel cable - 360° swivel hook