The OT series is a tractor rear mounted, mechanically driven onion topper, driven by the tractors PTO. It comes with different working widths from 150 to 225 cm. The OT is a compact machine, which fits all tractors and is used to lift top off the onions before harvesting, blowing the tops out into the wheel tracks. To allow a more efficient harvest, pick the front mounted version and add a rear mounted windrower.