ACCURATE: Liquid gauge measures in PSI (0-230) and Bar (0-16). Meets ANSI/ASME B40.1 standards. WHY LIQUID? Absorbs vibration/pressure spikes, reduces wear, and is better in corrosive environments EASY HANDLING: Durable/ergonomic grip. Quick fine tuning in case you exceed the target pressure. KWIK GRIP SAFETY CHUCK + long 3' hose eliminates crouching/backache when inflating/deflating tires. SOLID BRASS FITTINGS: Long-lasting performance, 1/4" NPT (F) air inlet. Milton 727 plug recommended.