Broan Model BP57 Aluminum/Carbon/Lens Range Hood Filter -11 3/8" x 11 3/4" x 3/8" - 4" Lens. Fits Broan 43000, NuTone SL6200-R, Rangeaire This is a Broan-NuTone Factory OEM product. PART CROSS REFERENCE: BROAN: BP57 SR610050 R610050Filters grease and odor. Used in non-ducted range hoods. Is not washable. Replace every 6-12 months. Constructed of layered expanded, bonded aluminum and a carbon poly pad with a plastic light diffuser, in an aluminum frame.