. TN241BK Toner cartridgeThis unit is used on the following models . HL-3140CW. HL-3150CDW. HL-3170CDW. DCP-9020CDW. MFC-9140CDN. MFC9330CDW. MFC9340CDWOriginal Brother toner is formulated to meet high quality resolution grey scale and block colour in line with Brother's high design specification.But don\'t be tempted to cut corners by using cheap consumables as this can mean poor results and in extreme cases could invalidate the manufacturer\'s warranty.  The manufacturer\'s original consumables will always be the best choice as they have been designed to deliver the best performance from our machines.Toner particle size shape and colour pigmentation all have a direct impact on the sharpness of the printed image. Brother\'s toner is formulated to exacting standards to ensure you receive high quality print resolution and reliability.Why not do your bit for the environment and return your used toner and drum units to our award winning recycling factory in Wales..