Motor side 4-7/8" ID - 6" OD.NOTE: Will fit stove models that have the 5-3/4" "Quick Change" style hub only. For use between blower housing and exhaust motor.Fits Whitfield® - Advantage All models, Legend & Quest, Breckwell® - P24, Big E, P2700 Mojave, P22 Maverick, P2000 Tahoe, P23 Sonora, P7000 Solstice, Enviro® - EF2, EF3, EF5 (Evolution), Empress FS, Empress FPI, Meridian, Milan, Mini, Solus & Windsor, Vistaflame® - VF 100 & VF Windsor, and Regency® - GF55 & GFI55.

Replaces Lennox® part # 61020015, Enviro® part # EF-012, and Breckwell® part # C-G-105.