... 5. Wood Grain(wood imitation) 6. Thermal Break(heat insulation) 7. Polish 5) Packing: Kraft paper, Pearl cotton foam, plastic film ... , building, channel, railing, bracket, glasshouses, heat sinks, etc.7)Procedure:extruding,cutting,coating,drilling8) Applications: windows, doors, curtain walls, cabinet, transportation, building, channel ...