... plus good after sales service 4. small MOQ PJH-75 compatible for HP J5780/PSC4280/PSC5280 POLYTONER Introduction 1. The strength ... printing consumables in China. The total investment of Polytoner is 6,000,000 RMB, production area 15,000 m2 . The ... POLYTONER and GREENCOMBO brands have 400 monochrome toner cartridge models, 300 color toner cartridge models and 300 chip models, covering almost all ...