Donaldson Company, Inc.'s TopSpin™ HD is its newest air pre-cleaner. The all-metal TopSpin HD is built for high-dust and heavy-debris environments, such as mining, construction, oil and gas and agriculture. Its high efficiency design delivers low restriction and enables it to separate and eject up to 80% of incoming contamination before it can reach the engine’s air cleaner. It also helps prolong air filter life, which results in less frequent air filter replacement, lower operating costs and less maintenance downtime. TopSpin HD is offered in eight sizes, so the end user can choose one that is appropriate for their air filtration system.