The bostitch c50 u portable compressor has a compact design with a a powerful 25hp 250 litres per minute motor that offers up to 40 more air displacement than other 50 litre models the oil lubricated pump gives long term durabilty and performance and the oversized twin tankoutput pressure gauges complete with integral easy to adjust air regulator makes setting for the correct working pressure quick and easy the ball style drain valve is designed for easy access and better durability vs threaded