The P17 has become the largest selling model due to its performance of 330 litres of free air. This is the largest single phase model you can buy on a 15amp power supply. Again it is super quiet and efficient for the amount of air you receive. It will run die grinders, most common air sanders and ¾” impact guns. This unit is truly manufactured for the professional and is fitted with new Smart Start filter regulator to reduce start up amps draw therefore improving the performance.