... stalks, peanut plants, sunflower stalks, bamboo sawdust, bagasse , wood chips, rice husk, coffee husk, coir pith, jute sticks, groundnut shells, Bamboo ... stalk and cotton stalks ,nutshell, coconut shell ,etc Working principle:Briquette machine uses a large screw to grind, compress and extrude ... my best to satisfy you. Thank you ! good quality wood charcoal briquette machine with favorable price