Less effort, Hills have made the MK4 pump even easier to pump up to 300 bar - 4500 psi. High volume, so less pumping. Field service, you can strip the pump in the field quickly with few tools. Flexible hose, now longer and more flexible. Additonal Dry Pac gives 90% dry air, great for your gun. It can be purchased together in a complete kit with the pump, or bought and easily fitted later as an optional extra. The Hills Pump MK4 includes hose with 1/8" BSP connection.