The most popular of the Cusco bars is the Type OS. The classic design features a tubular aluminum oval shaft with a high polish finish. The aluminum bar possesses high rigidity due to the two different designs available. The Cusco OS Type 1 is pressed ribbed while the Cusco OS Type 2 is sectioned. Cusco has already chosen the ideal design for each application. The end plates are painted the traditional Cusco blue and come with all the required hardware for easy installation. It bolts on in minutes using normal hand tools.