(a) The Silk flow diverter which is made of 48 braided nitinol strands with its flared ends. (b) The Surpass flow diverter which is made of cobalt-chromium alloy; also note the inner body that functions as a delivery wire. Reproduced with permission from (1) Balt Extrusion, Montmorency, France, and (2) Stryker Neurovascular.