Generall: Our roll bars for roadster are generally made from stainless steel, they are plasmabeamweldet and have a unbelievebale hand-polished finish. Our customers are exclusive tuning companys around the world. What we offer here is a small sellection from our produkt line and available from us direkt. Safety: For our roll-bars we have reached a high conclusion beetween safety and optical harmony. For some cars like the SLK or Z3  the German TUV gave us the same mechanical properties than OEM. For roadster like the MIATA or BARCHETTA which have no overroll-system factory build in, and more the body structure is not designed for a overroll-system we have tryed to give them a safety feature, meeting our requirements of taste and make them payable.  We do not sell those bars as full safe rollbars. Even so the roll-bars should be installable in less than 2 hours. If you go on race tracks, we recomment using a roll-cage. For more questions to the safety topic mail Prototypes: In the 5 year history of ALUMEX we have developed a high amount of special constructions for historic racing, special cars and exhibitions. Please do not hesistate to inqiure with your ideas. You will find some samples in the prototype section.