The JCB 444E0391 is a genuine OEM limit switch designed for use in a wide range of JCB machinery. This essential component ensures proper operation and safety across various JCB 3CX and 4CX backhoe loaders, Loadall telehandlers including 530, 535, 540, 541, 550 models, and JS series excavators such as JS130, JS140, JS160, JS180, JS200, JS220, JS240, JS260, JS330, and JS360. It plays a critical role in monitoring mechanical limits within the machine's systems.