National 880c Boom Truck 21 ton capacity 4-section 80' boom with tip height of 90' tele swing away jib, SFO front stabilizer for 360 degree stability 20' steel deck 2-part line block and rear boom rest and steel bulkhead Mounted on 2000 Sterling Miles: 50,500 and about 6100 hours 9-speed Roar Ranger Transmission 300 h.p Cat engine