The JCB 99100134 is a genuine OEM hydraulic cylinder seal kit designed for various JCB machinery. This kit is commonly used in 3CX and 4CX backhoe loaders, as well as Loadall telehandlers including models 530, 535, 540, 541, and 550. It features an inner diameter of 60mm and an outer diameter of 100mm, ensuring optimal performance and preventing leaks in hydraulic systems.