This offering is for a 250 page rear paper guide. This part goes into the paper cassette. This offering is for the paper guide in the picture NOT the cassette. This guide fits into the 1st 250 page paper cassette tray for the following Brother devices: HL3170CDW, HL-3170CDW, MFC9340CDW, MFC-9340CDW This item is NEW and a TRUE Brother part! Dont see your model number listed above? Send us a message as happy to help!