The heavy-duty four-gallon stacked tank contractor air compressor (E810-4V) from Emglo Compressors is designed for the trim carpenter, remodeler, framer, roofer or flooring professional and can support up to four brad or finish nailers or two framing, roofing or flooring nailers at once. Also equipped withoil-lubricated pumps with cast iron cylinders that help enhance pump life and provide durability during operation.A site glass allows contractors to easily check oil and features easy access to the crankcase for maintenance. 888-883-6456. Emglo.com.