Incorporating 30 mm load balls with load ratings up to 771 lb/unit, Heavy Duty 806 ball transfer units can be accessed for cleaning. Features include solid-steel machined housings and tops that protect against impact damage, and self-cleaning slotted exit hole to filter large debris particles. Units can be supplied with steel bearings and zinc-plated components, stainless bearings and zinc-plated components, or all-stainless bearings and components. They benefit air cargo handling systems.