Imageworks is known for high quality calibration pumps. The COMBO·PUMP's unique single compound lever pump handle generates faster pressure or vacuum buildup with fewer strokes and much less operator fatigue than other pumps. COMBO·PUMP is made for years of no-maintenance service in demanding industrial environments. All moving parts of the pump mechanism are protected inside the pump handle from damage and dirt; no exposed springs, piston rods, etc. The body and handle are anodized aircraft-grade aluminum and all moving parts are high strength corrosion-proof plastics and metal.