The JCB 04800478 is a genuine OEM O-ring, also referred to as a packing, designed for a wide range of JCB agricultural, construction, and industrial machinery. This essential sealing component ensures a tight, leak-free connection, maintaining system integrity and preventing fluid loss. With an inner diameter of 110 mm, an outer diameter of 116 mm, and a thickness of 3 mm, it provides a precise fit for compatible JCB models including JS series excavators, 3CX/4CX/5CX backhoe loaders, and 531-70 series telehandlers, among others.