The Giant Pumps 8331 is a new radial shaft seal for pumps. It is used to replace a worn one in pump models P208, P209, P218, P221, P228, P200-5100, P200-5111, P200-5121, and P200-5180. Performing regular maintenance on your pumps ensures better performance and efficiency over the life of your pump. A genuine OEM part that ensures a proper fit when used in the recommended pump models.