1High wearresistant developing roller, strong wear resistance, high friction charge, clear printing and no paper jam. 2Macromolecule environmental protection material, onepiece molding, more firm and durable, matching the machine to avoid various powder leakage problems. 3Powderfilling port design is convenient and quick, making it simple and easy to add powder. 4Applicable to most models in the market, which makes it convenient and more practical. 5Adopts environmentally friendly ABS engineering plastic parts and toner, you can use it safely without worrying. 6The toner cartridge is designed to fit the machine, and the meticulous root causes the print to be more stable.