The 500E2 from National Crane offers an 18USt capacity. The crane is available in a 71 Ft. boom length and can be configured as a behind cab mount or tractor mount. A state-of-the art hydraulic system provides the smoothest operation in the market. Available with: Three-section boom Internal anti-two-block Easy Glide wear pads Hydraulic Capacity Alert System (HCAS) Proportional boom extension High Performance planetary winch