High pressure is one of the best ways to determine if your pool filter needs cleaning. This item is easy to attach and fits most filters and pumps. It measures water pressure up to 60-PSI (pounds per square inch) and helps you keep your pool clean. Product Features: Pressure gauge pool accessory gauge measures water Comes with rigid construction Measures up to 60 pounds per square inch Rear mounting and fits most filters and pumps 1/4 pipe thread Dimensions: Gauge measures 2 high x 2.25 diameter Material(s): plastic/metal