Specifications include, but are not limited to: Shall be a self contained unit to be mounted on a truck chassis. Minimum 6 yd capacity rectangular shaped aggregate hopper. Unit must produce a minimum of 135 lbs. Of mix per minute under normal patching operation. Minimum 10" channel on main frame. Aggregate hopper opening minimum 9' x 7' for safe and easy loading. Directional arrow board on rear safety. Vibrator on aggregate hopper. Patcher shall be capable of delivering aggregate size 1/2" down down in a continuous flow by a pressurized air stream system.