The INA-FAG 1210C3FS is a high-quality genuine self-aligning ball bearing designed to accommodate static and dynamic misalignment. This specific bearing features a 50 mm bore diameter, a 90 mm outer diameter, and a 20 mm width. It comes with C3 internal clearance, which is greater than normal clearance, suitable for applications with high temperatures, interference fits, or where shaft deflection is expected. The 'FS' suffix typically indicates a specific cage or seal configuration, though detailed information for 'FS' on this specific part is not consistently available across all sources. It is manufactured by INA-FAG, a renowned brand for precision bearings.