1) The document describes the SimpoLED-8180 modular passive LED cooler. It has a diameter of 81mm and standard height of 80mm, and is made of extruded aluminum. 2) It can directly mount a wide range of LED modules and COBs through mounting holes. Thermal resistance ranges from 1.6°C/W. 3) Details are provided on recommended thermal interface materials between the LED module and cooler, as well as thermal performance data tables for heat sink temperature rise and dissipated power levels.