The JCB 90420163 Ring Back-Up is a genuine OEM component designed for hydraulic systems across a wide range of JCB heavy machinery. This essential guide ring provides crucial support and ensures effective sealing for hydraulic cylinders, contributing to the longevity and optimal performance of the equipment. It features an inner diameter of 100 mm, an outer diameter of 110 mm, and a thickness of 10 mm. This part is compatible with numerous JCB telescopic loaders, wheel loaders, forklifts, backhoe loaders, compact loaders, compact track loaders, mini excavators, tracked excavators, and wheeled excavators.