This genuine JCB 30903302 plug is an authentic OEM replacement part designed for a wide range of JCB machinery. It is compatible with popular models such as the 3CX, 4CX, and 5CX backhoe loaders, as well as numerous JS series excavators including JS130, JS140, JS160, JS180, JS200, JS220, JS240, and JS260. Manufactured to JCB's stringent quality standards, this plug ensures proper fit and reliable function, maintaining the integrity of your equipment's hydraulic or other sealed systems.