Heavy Duty Payload KitProduct Overview This comprehensive kit includes load spreaders for stability and extra shock absorbers for added shock and vibration protection when additional weight is required. The kit is designed for use with 3SKB 24 inch, 28 inch, and 30 inch shock racks and provides enhanced load support. Prop65 Information This product can expose you to chemicals including carbon black, which is known to the State of California to cause cancer and birth