TopSpin™ HD extends primary air filter life, boosts system efficiency and extends engine life in medium to heavy dust environments. • Separates up to 80% of incoming contaminant per ISO 5011. • All-metal pre-cleaner is a durable solution for punishing conditions. • All the interior components are solid stainless steel to resist dirt, water, heat, and debris encountered in demanding environments. • One-piece stainless-steel impeller is the only moving part. Dual bearings ensure reliable performance.