... thickness fiberglass cotton insulation3Hearth304 SS steel, 2mm thickness, with necessary gap for hot stretching4Hot air duct304 SS steel ... the air gate5Log turning structureHydraulic structure, specially designed components, stable log turning operation6Billet deliveryMechanical arm take the ... burned3Fire flame310S SS steel made, speaker shaped, fixed with flange and SS steel screws on the burning ...