Common sizes for inspection well molds: inner diameter 100cm, outer diameter 120cm; inner diameter 100cm, outer diameter 140cm; inner diameter 125cm, outer diameter 165cm; inner diameter 150cm, outer diameter 190cm, custom sizes available. Inspection well molds play a significant role in urban pipeline renovations, including drainage, water supply, cable, gas, and telecommunications pipelines, with very standardized models and specifications. They offer more advantages than brick-lined wells and plastic wells. Inspection well molds come in a wide range, including square, rectangular, circular, and elliptical shapes, with sizes ranging from φ700 to φ1500. They consist of well chambers and bases and are easy to install.