Cast iron cylinder and crankshaft, Two stage with 175psi on high pressure models, Honda petrol engine, Oil alert engine shut down, Auto idle control - increase fuel efficiency, increase in compressor life, reduction in noise and temperature, cooler pump operation, Tanks meet Australian Standard AS1210, Honda & Techtop National Service Network, NEW Stationary UTE mount model (CP23-S) is also available with ABAC upright pump option