This is an INA Aux Belt Tensioner, part number 534060710. It is a v-ribbed belt tensioner with a width of 26 mm and an outer diameter of 65 mm. It replaces part number 534007010. This part is compatible with FIAT OEM references 46819146 and 51821652, and FORD OEM references 1539115, 1598372, 9S516A228BA, and 9S516A228BB. It is also cross-referenced with parts from AUTEX, BREDA LORETT, DAYCO, FEBI BILSTEIN, GATES, IPD, QUINTON HAZELL, RUVILLE, SCHAEFFLER GRUPPE, SKF, SNR, and TRIPLE FIVE. Please verify compatibility with your specific vehicle before ordering.