Laser lithotripsy has previously been a form of therapy that was not only complicated but also time consuming. Richard Wolf decided to look into these issues and to take on the challenge of making them better. The result was the Cobra, the very first in flexibility - a dual channel laser uretero-renoscope. This instrument solves many of the problems faced by medical staff. This device serves higher image resolution and with a more brilliant image, it is even brigher and larger as it should be. Due to the stainless steel construction it is really light weight. The sheath tube offers a smaller diameter, an extra long profiled distal end with a slimmer and more tapered profile. This device offers the highest stablity with a longer service life. It is what advancement in the medical industry is all about.