... service life CE Approved bioenergy ring die wood pellet machineApplication:a. Ring mould pellet machine is suitable for large farms, and organic herbal medicine and chemical industry etc ... straw, wood-dust, bamboo powder, cotton wood, peanuts shell, straw, clover, cotton seed shell etc... and can mix with all kinds ... with diameter of 1.5, 2, 3, 3.5 and 2.5,4,5,6,8,10, and 12 of the aperture ring die ...