The MASTER SPG 52 mm pressure gauge (0–360 bar) features hardened mineral glass, which is virtually scratch-resistant and extends the life of your pressure gauge. The robust, nickel-plated brass housing can be used with or without a protective cap. The highly visible, phosphorescent bezel allows for easy pressure reading in any environment. Also included is a double-sided O-ring air spool for mounting a swivel hose. The housing is coated with an extremely scratch-resistant black paint.