How It's Made S4E7 3D Commercial Signs, Hardwood Floors, Corrugated Polyethylene Pipe, Mattresses

How It's Made Season 4 Episode 7 Online – Plastic and metal are cut and formed into three-dimensional commercial signs, hardwood is dried, milled and finished into flooring, molten polyethylene is extruded into corrugated pipe, and springs, foam and fabric are assembled into mattresses.