AIRFORCE MK4 Tyre Inflator is robust and highly accurate, offering leading inflation and deflation rates and high performance for both indoor and outdoor applications Lighter Weight- Gauge body weighs 923g, less work strain and easier for repetitive use Biomorphic Shape- Ergonomic, easier to use and less prone to damage when dropped Valve Mechanism- Simplified 2 stage mechanism design prevents user having to in.pushin. against full line pressure on deflate preventing fatigue Piston & Seal Design- New design, less drag, reduced friction & less movement inertia means no internal corrosion, no sticking and no skewing of accuracy