Siera has refined skills in processing metal tubes and in providing customized workings. It realizes on tubes, sheets, section bars and drawn products several metal processes and treatments such as bending, welding, turning, cutting, flowdrilling, satinizing, etc., also on tubes with small diametre. We produce components and accessories (for example handles, knobs, legs for tables, tubular benches) for furnishing, cycling and other industries. We work on drawing or sample.