To allow for increased flexibility and comfort, this product comes complete with a double helix design. Improved radial force comes from the Cobalt chromium alloy, favoured over the traditional stainless steel. The PROBIO coating means that you will no longer have to worry about Nickel or other heavy metals causing restenosis. Superior visibility is offered with the radiopaque marker ring, meaning more accurate stent placement. With the predictable stent length you can be assured of accurate placements.