This main drive belt is suitable for Zebra ZM400 ZM600 ZT410 ZT420 ZT411 ZT421 (203dpi) thermal label barcode printer. Part number: 79866M/20006. Please check the device model carefully before purchasing. The belt is made of high-quality PU material, which has super wear resistance, reduces the damage caused to the belt by gear rotation, and has a longer service life. The belt is soft and tough, and the inner side adopts a wavy design to accurately fit the gear, making the belt run smoothly and not easy to fall off. The belt has good sound insulation effect, which can reduce the sound of friction between the belt and the gear, giving you a more comfortable experience. The belt has excellent thermal insulation properties. The gear will heat up during long-term use and will not affect the belt. We conduct multiple strict quality inspections before shipping.