The company's truck-mounted and tractor-drawn spreaders are designed for dust-free pneumatic loading. The machines apply materials in rates as high as 70 pounds per square yard in a 10- or 12-foot-wide level swath. Surrounding the spreading auger with dust curtains helps control dust. Low flow spray bars may be mounted along the auger for additional dust control. A 5-psi relief valve and a 10-psi rupture disc protect the hopper. Access to the interior is through removable side panels or top panel.