35 Business services, namely, sourcing services for others for the production, manufacture, machining, fabrication and finishing of aluminum and steel components, manufacture and assembly of printed circuit boards, and tool and die making; purchasing namely aluminum extrusions, sheet steel and aluminum, sheet plastic, sheet vinyl and fabric, anodizing products, powder coating products, and cardboard packaging; quality inspection for others, namely, inspection of materials, components, and assemblies, comparison of materials and verification of quantities received with the specifications provided by the customer