Prominaet Architectural Sheet Metal manufacturer and subcontractor in Los Angeles area , since 1935 . Concentration in Commercial private and public construcion Avrage annual sales 18 M . Specialized in Custom Arcitectural Sheet Metal of types, Galvanized, Aluminum, Stainless Steel, Copper, Zinc and Lead. Products covered such as lMetal roofing, Metal Siding, Metal Panel systems, Louvers, Smoke hatches and vents, Custom Metal Framed Glass Skylights, Standard, Plastic Skylights.