... layer300mm thickness fiberglass cotton insulation3Hearth304 SS steel, 2mm thickness, with necessary gap for hot stretching4Hot air duct304 SS steel, ... to extrusion press7Log indicationThree sets, precise log position indicate, automatic log moving and log loading8Air cooling system550w centrifugal fans cooling the ... 310S material, Taiwan made motor, cooling by air Multi-log furnace with hot log shear