This Flat Idler Pulley is a direct OEM part for Toro 106-2175 and Exmark 106-2175, 132-9420. This recumbent idler pulley works both as an OEM and as a general-purpose pulley for power transmission such as compressors, industrial fans, lawn mowers, snow blowers, and electric motors. This mower pulley part is compatible with Toro TimeCutter models: MX3450, MX4250, MX4260, SS3200, SS3216, SS4216, SS5000, SS5035, SS5060, SW3200, SW4200, Z18-44Z, Z380, Z480, Z4200, Z5020, ZS3200S, ZS4200, ZS4200S, ZS4200TF, ZS5000TF, ZX480 and the following Exmark models: 42" Quest, 42" Quest E Series, 42" Quest S Series, 50" Quest, 50" Quest E Series, 50" Quest S Series, 54" Quest E Series. This Toro and Exmark parts pulley fits the following deck sizes: 32", 38", 42", 50", and 54". It comes with a bore adapter to bush down from 17 mm to 9.52 mm (3/8 in.) inside diameter. 31325100D features a heavy duty sealed radial single-row bearing. This part is painted black to prevent rusting. Additional features include made of steel flanges angled outward to help increase belt life. This toro zero turn mower parts has many uses: to redirect the belt, keep the belt in place, press against the belt to engage. The goal is to move power or items from one place to another. This recumbent idler pulley moves power by having a drive pulley attached to a motor, that will cause another pulley, the drive pulley, to spin. Terre (formerly Phoenix Distribution) is your source for genuine, affordable OEM and general-purpose mechanical motion parts and outdoor power equipment. The quality of our products and our service is at the root of all we do. Let us help you find the right parts for the right application at the right time.