The invention is an antimicrobial photo-stable coating composition that deters photo-induced discoloration, does not stain tissue and can be applied to the surface of a variety of medical materials. The blunt end member includes jaw sections which have a first closed position for locating the blunt end member at the site of the occlusion within the native lumen of the blood vessel and a second open position wherein the jaw sections are able to press against the interior walls of the lumen adjacent the occlusion. The second member includes a pair of protruding arms to be inserted into a corresponding pair of recesses in a circuit breaker housing. of 5 mm2s or lower, and a high-viscosity base oil having a kinematic viscosity at 40\xb0 C.