· Brand: Appco Besser Price: 85, Condition: Used FOB: Oklahoma Model: M12 Description: One Used Appco Besser M12 Concrete Batch Plant with 80 ton main silo, 50 ton Flyash silo with auger, 150 ton 4 compartment agg bin, silo collectors 24" x 85' radial stacker with 10' x 10' hopper and 12 yard scales.