1PCS MX51 Developer Powder For MX4128 5128 4148 5148 MX51 Copier Color Compatible Developer 230g This developer powder is designed for use with MX51 copiers and is compatible with models MX4128, 5128, 4148, 5148, and MX51. It supports color copying functions and comes in a 230g unit. The powder aids in the development of toner during the printing process, helping maintain consistent image output. It is intended as a replacement developer for routine maintenance or replenishment in compatible machines. Compatibility Disclaimer: This is an aftermarket replacement part. Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.