With air delivery of 3.7 at 90 PSI, this compressor is designed for nailing and construction projects. The powerful motor combined with the cast iron pump allows for high quality performance and starting capabilities. Ideal for contractors! Oil lubricated, cast iron pump for long lasting, reliable performance Twin stack configuration allows for consistent pressure and is the preferred contractor design for easy portability and storage Plugs into a standard 120-Volt household outlet no special motor start required Great for staplers and nailers for roofing, decking, flooring, construction projects, etc. Oil level sight indicator allows for easy oil check and balance