Progress Lighting PV001-30 50 cfm bath fan. Sound level rating 4.0 sones. Textured White White Ventilation Fan For rooms up to 45 sq. ft., this exhaust fan provides dependable performance. Galvanized housing and polycarbonate grill for durable long-life operation. White finish 4 in. duct adapter 50 cfm, 4.0 Sone rating 8-1/2 In. Width x 5-1/8 In. Height