FlowLED COB & SMD LED Heat Sinks Wakefield-Vette FlowLED COB and SMD LED Heat Sinks for active and passive cooling are compact with a large amount of surface area. The series features a radial design with mounting holes to mount LED modules and COBs directly. The heat sinks are black anodized and extruded from highly conductive aluminum. Wakefield-Vette FlowLED heat sinks are compatible with many different LED modules and COBs.