With unique design, this vertical ring die wood pellet mill is new type roller-driven wood pellet machine. Adopting vertical feeding and ring die, it has advantages of ring die pellet mill and flat die pellet mill. Meanwhile, due to the roller-driven design, the vertical ring die wood pellet machine is suitable to process hard biomass material such as pine, poplar, eucalyptus, birch as weel as wood chips, bamboo, sawdust, crop straws. So if you want to start pellet business, it is a good choice for you.