100 x 200mm (x 40mm height) finned Aluminium extrusion for heatsinking 3W LEDs.
Just right for two 15 or 18 LED PCBs, for a total of up to 36 LEDs, or about 60W of LEDs, with active cooling. Passively cooled (no fan), this heatsink can only sink around 30W of 3W LEDs before it gets pretty toasty.
