Check the listing for details. 【Upgrade】 Model 671 Fan Compatible with Nutone 671rb, 672r, Compat. Condition: New. Listed at 75.81 USD. 【Upgrade】 Model 671 Fan Compatible with Nutone 671rb, 672r, Compatible with Broan 750,751,752,N750,Compatible with 671, 671R, 671RB, 672, 672R, 672RB Unit, 3.5 Sones, 9"×9". Model: 671RB 672R. Model 671(90CFM): Compatible with Nutone 671(NOT FIT BROAN 671), 672, 672R, 672RB, 671R,671RB.