... -30mm pellet length:20-50mm warranty for 5 years quick-wear parts working 2000 hours ... ,more reasonable structure and stability,Professional for Wood,Rice husk,Peanut shell,Bamboo and Palm fiber etc ... ,In this hardness can assure the pelleting quality and warranty time,Working manner is from inside ... force and extrusion pressure together,Produced more capacity,At the same time assure hardness and density, ...