The SaltDogg® PRO4000 is a 4 cubic yard poly hopper spreader with a full-length steel auger, built for medium and heavy-duty commercial work. It mounts to dump trucks and flatbeds rated at a minimum 17,500 lb GVW and handles bulk salt or a 50/50 sand/salt mix. A 5-1/2 in. steel auger keeps material moving to an 18 in. spinner that broadcasts 5 to 30 ft. Double-wall poly hopper on a stainless steel frame with a stainless auger trough 12V DC electric or hydraulic drive with independent auger and spinner motors 3/4 HP auger drive motor and 1/2 HP spinner motor In-cab control of independent auger and spinner speeds; vibrator control on the electric version only Vibrator, top screens, inverted V, tie downs and remote auger bearing grease kit included Backed by a 2 year warranty and made in the USA Specifications Hopper material: Polyethylene, black Trough material: 304 stainless steel Feed mechanism: Full length 5-1/2 in. auger Spinner: 18.00 in. polyurethane Spreading width range: 5 to 30 ft System voltage: 12 VDC Overall dimensions: 114.80 in. L x 74.00 in. W x 43.50 in. H