The JCB 26501289 Sight Glass is a genuine OEM component designed for precise oil level indication in various JCB machines equipped with Dieselmax engines. This high-quality sight glass ensures reliable monitoring of fluid levels, crucial for engine maintenance and operational efficiency. It is a direct replacement part, guaranteeing proper fit and function for models such as 3CX, 4CX, 531-70, JS130, and TM320.