Aluminum die-casting unit covered with rubber sleeve for extra comfort and durability; Clear and easy to read; 3 in 1 function: inflate, deflate and measure tire pressure; Two position inflate/deflate lever; Increased safety and reduced tire-related incidents; Works with CO₂ (carbon dioxide); Unit includes a 21″" hose; 3-18″" (80mm) pressure gauge (0-12 Bar/174Psi); Diameter of the dial: 3-1/8″" (80mm)