*PLUMBERSSTOCK EXPERT* responded:
Good day! Are you referring to the NuTone 763RLN light/vent fan? If so, then, this Broan-NuTone 89108000 is the lens that you're looking for. According to page 8 of this Installation Manual, this product works for Broan- NuTone 763RLN and 769RL ventilation fans. To help you determine its exact dimensions, it would be best to see the dimensional drawing on page 2 of this Specification Sheet. If this is what you need, order it now by clicking on Add to Cart and entering the required information. Thank you for trusting PlumbersStock.com!