Specifications include, but are not limited to: It is the intent of this specification to describe the requirements for an under tailgate material spreader for applying granular deicing materials on the highway. Unit to be capable of spreading free flowing granular materials, abrasives and chemicals. Unit to be under tailgate type spreader which will not interfere with normal operation of dump body and tailgate. Unit shall be single auger type with direct drive hydraulic motor having a displacement of approximately 23.0 +/- 0.5 cu. in./ revolution equal to Char-Lynn Model 101-1008. It is the intent of the specifications to describe a dump body under tailgate conveyor. Units shall be an under tailgate 18” conveyor. Shall be capable of bi-directional operation to allow for the transferring of material to the right or left side of conveyer for repair of road shoulders, asphalt patching and transferring other road material.