The new AIRFORCE MK4 Tyre Inflator is as robust as ever and highly accurate, offering leading inflation and deflation rates and high performance for both indoor and outdoor applications. Features and Benefits By increasing the size of the viewing window to give a 20% larger field of view, and altering the graphic print to give a clearer scale reading, the new gauge is even more user friendly With a new, modern slim line body design the gauge is now lighter yet more ergonomic to give increased comfort in use Redesigned piston and seal arrangement means increased accuracy - cycle tests now give over 400,000 inflation cycles at 100% accuracy - over 50% more than previously!