The Winco All-Terrain 4-Wheel Dolly Kit WL12000HE-WL18000VE-HPS12000HE gives your generator excellent mobility on the ground without any lifting. The 10″ flat free tires get you through mud, snow, sand and soggy lawns. Both solid steel axles run the entire width of the generator providing superior strength. All components are protected from corrosion with our durable baked on powder coat paint system. This dolly kit is available for generators from 6kW-9.5kW. This model fits the WL12000HE, WL18000VE and HPS12000HE. The HPS12000HE comes with a 4-wheel dolly kit standard.