Buyers Products SaltDogg® PRO4000 Series Poly Hopper Spreaders with Auger Model PRO4000Buyers Products SaltDogg PRO4000 Series Poly Hopper Spreaders with Auger Model PRO4000 Buyers Products SaltDogg PRO4000 Series Poly Hopper Spreaders give contractors and property managers a powerful spreader for medium and heavy duty commercial use. The spreader works with dump trucks and flatbeds with a minimum 17,500 GVW (gross vehicle weight). The 4 cubic yard spreader handles bulk salt or a 50 50 salt sand mix. Its electric powered design means