A watercooler I designed for the E3D chimera. The small stock cooler couldn't handle 2x 250°C in a heated chamber at 60°C. The is basically a cup that gets glued onto the original aluminum heatsink. It's designed to fit onto a genuine E3D heatsink I ordered December 2015. I don't know if it will fit to older / newer versions or to a chinese knockoff. For a perfect fit i resized mine to 1.02 before printing to compensate shrinking from cooling down. I'd suggest to try some sizes first before commiting to one.http://imgur.com/a/RAu3chttps://youtu.be/V1kokO0youQ