The 689-2RS is a precision miniature deep groove ball bearing designed for light-duty applications where space is limited and reliable performance is essential. Featuring a compact 9mm bore, 17mm outer diameter, and 5mm width, this double rubber sealed bearing is factory-lubricated and maintenance-free. It delivers smooth, quiet rotation with excellent protection against dust and moisture, making it ideal for small electric motors, 3D printers, medical devices, and office automation equipment.