2.00" polypropylene Grip-N-Lock well cap for superior well water protection Designed for use with SCH40 or SCH80 PVC pipe fittings Overall Dimensions: 3 7/8" x 2 3/4" x 4 3/8" Ultra-high chemical and temperature resistance Designed, engineered, and manufactured in the USA Enviro Design Product's 2" Grip-N-Lock is a hinged locking well cap that is easy to install - no grouting, screwing, riveting, or gluing required. Securely held by 10 internal watertight concentric rings, it has a square UV protective gasket that creates a watertight compression seal. Grip-N-Lock is the only watertight hinging monitoring well cap in the environmental industry. Its claim to fame is its tamper-proof design; a standard padlock can be used to keep out unauthorized users.