Littleford plow Mixer/Dryer system. National Board Serial number 12025 Rated for the following: Shell, Full Vacuum internal gear reducer Manufactured by Falk, model # 4207509, rated for 9.492:1 ratio Hostile Environment High Efficency AC but no chopper is installed with this blender. With mixer dryer is a vacuum system manufactured by Travani Pumps. Serial # A5934, Type: PLM3315C-A3. Vacuum system includes a water seal vacuum pump, controls, knock out pot and cooler for seal water.