... boiler, stove, home heating, BBQ, etc.2) We use durable material to make the machine and extend machine life for 4 ... ,etc. ( solid or hollow ) Briquette Diameter :20-80mm 3.Raw Material 1)Raw material size should be smaller than 5mm. 2)The best moisture ... 132 Briquette Diameter(mm) φ18~30 φ20~35 φ20~35Raw material moisture12~14%If any need, please contact us for details ...