Grain Cleaners up to 30,000 bushels per hour. Removes fines, trash, and air/aspiration available for straw and dust removal slide-in, slide-out screens for over 60 commodities, 1 RPM to 1800 RPM speed control. Plant and offices in Roseville, California: Guaranteed and We Service. Industrial Quality for commercial or farm use: Compact and USA Built Patented: Standard Models 5'000 BPH, 15-20,000 BPH, 30,000 BPH: We also custom build.