Materials Machined Aluminum Brass Cast Aluminum Extrusions Steel High Temp Alloys Plastics ABS ((Acrylonitrile Butadiene Styrene) Acrylic / Plexiglas ( Poly(methyl methacrylate Delrin/Acetal (Polyoxymethylene) Peek (Polyether Ether Ketone) PVC (Polyvinyl chloride) Teflon UHMWPE (Ultra-high-molecular-weight polyethylene) Stainless Steel Steel Titanium