This genuine JCB 10301279 shim is designed for accurate adjustment and spacing within JCB agricultural and construction machinery. With a thickness of 0.25 mm, an outer diameter of 30 mm, and an inner diameter of 20 mm, this precision component ensures optimal fit and function. It is suitable for a wide range of JCB models including 3CX, 4CX backhoe loaders, 520, 525, 527, 530, 532, 535, 540, 541, 550 telehandlers, and various JS series excavators.