Ideal to Use for Swimming Pools, Spas, Hot Tubs, Aquariums and any Other Water Systems. Pressure Range: 0-160PSI scale / Accuracy: +/-3-2-3% Easy to Install, 1-1/2" Dial, Rear Mount 1/8", Works with Most Major Brands with Suitable Connection Black steel case, brass wetted parts, dry 1/8" NPT Rear Mount Compatible with most major branded pressure pumps on the market