The flexible couplings are standard manufactured in steel and seawater resisting aluminum. Other materials e.g. non-magnetic stainless steel can be supplied if required. The coupling will maintain drive in the event of damage occurring to the rubber elements. All flexible marine couplings can be supplied with an adaptor flange or adaptor shaft, to fit any available reduction gearboxes brand worldwide. In addition to the standard range, heavy duty and special couplings can be made to meet particular requirements .