The JCB 71440125 Alternator Pulley is a genuine OEM component designed for various JCB machinery, including 3CX and 4CX Backhoe Loaders, Loadall telehandlers (520, 525, 526, 527, 528, 530, 531, 532, 533, 535, 536, 537, 540, 541, 550 series), and JS Excavators (JS130, JS140, JS160, JS180, JS200, JS220, JS240, JS260, JS300, JS330, JS360). This alternator pulley features an outer diameter of 58 mm, an inner bore diameter of 17 mm, and a width of 34 mm, with 6 poly-V grooves for efficient power transmission.