Airhead AHPG-1 Pressure Gauge Ensure that your inflatables are inflated to the proper pressure for peak performance with AIRHEAD's Air Pressure Gauge. Maybe even more importantly, protect your investment by not overinflating them, causing irreparable damage. AIRHEAD's Air Pressure Gauge monitors air pressure from 0 - 5 psi with precision. Works with Speed Safety Valve, Boston Valve, H Valve, and Stem Valves.