【Part Number】Replace for S99080596D, S99080596B, 99080596D, 99080596B, 99080596A, 99080596 and 99080596C 【Application】Compatible with 504-A 504-B 504MG 504-C Vertical Discharge 【Application】For detailed application check the detailed description below 【Spec】5/16" x 2-7/8" Shaft 120V, 1.5 Amps 【Customer Service】 If you have any inquiries about model or installation or other aspects, please feel free to contact us before ordering. Fits These Models: Compatible with 502 Ventilation Fan Compatible with 504 Ventilation Fan Compatible with 506 Ventilation Fan Compatible with 508 Ventilation Fan Compatible with 510 Ventilation Fan Compatible with 506B Chain Operated Ventilation Fan Compatible with 504-A Vertical Discharge Fan - 350 Cfm / 6.5 Sones Compatible with 504-B Vertical Discharge Fan - 350 Cfm / 6.5 Sones Compatible with 504MG Vertical Discharge Fan - 350 Cfm / 6.5 Sones Compatible with 504-C Vertical Discharge Fan - 350 Cfm / 6.5 Sones Compatible with 508-A Through Wall Fan - 270 Cfm / 6.0 Sones Compatible with 502-A Wall/Ceiling Mount Side Discharge Fan - 270 Cfm / 8.0 Sones Compatible with 508-B Through Wall Fan - 270 Cfm / 6.0 Sones Compatible with 502-B Wall/Ceiling Mount Side Discharge Fan - 270 Cfm / 8.0 Sones Compatible with 508-C Through Wall Fan - 270 Cfm / 6.0 Sones Compatible with 502MG Wall/Ceiling Mount Side Discharge Fan - 270 Cfm / 8.0 Sones Compatible with 502-C Wall/Ceiling Mount Side Discharge Fan - 270 Cfm / 8.0 Sones Compatible with 508-D Through Wall Fan - 270 Cfm / 6.0 Sones Compatible with 508MG Through Wall Fan - 270 Cfm / 6.0 Sones Compatible with 510-A Room-To-Room Fan - 380 Cfm / 6.5 Sones Compatible with 510MG Room-To-Room Fan - 380 Cfm / 6.5 Sones Compatible with 510-B Room-To-Room Fan - 380 Cfm / 6.5 Sones Compatible with 510-C Room-To-Room Fan - 380 Cfm / 6.5 Sones Compatible with 506-A Chain Operated Through-Wall Fan - 470 Cfm / 8.0 Sones Compatible with 506MG Chain Operated Through-Wall Fan - 470 Cfm / 8.0 Sones Compatible with 506-D Chain Operated Through-Wall Fan - 470 Cfm / 8.0 Sones Compatible with 506-C Chain Operated Through-Wall Fan - 470 Cfm / 8.0 Sones