Wide Compatibility: Compatible with all models equipped with the same metal blade. Compatible with Nutone: (NOT FIT 696N) 696N-R02B、696N-R01 B、696N-R03 B、695-R02 B、695-R01B、695-R03 B. Compatible with Broan: 688-K、 688-J、688-H、 688-G、663-J、663-H、663G、670、671 [670 & 671 is 70 CFM ,Not Compatible with Nutone]. As well as other models with the same fan assembly size. Powerful Functionality: The s97012026 fan quickly improves indoor air quality by addressing issues such as mold, water vapor, unpleasant odors, and damp conditions. Specifications: The 663 688 replacement is 3000 RPM, 50 CFM, 120 V, 60 Hz, rotation= CW, blower wheel 2-prong plug. Product Advantages: 688 j replacement fan motor features a high quality shell, thickened iron plate for stability and noise reduction, and durable materials tested for longevity. Protect: We provide a 1 year protect for the 688 k replacement. If you encounter any issues with the product, please contact us. We are committed to ensuring customer satisfaction. You can make your purchase with confidence. new S97012026