Ebmpapst 4118 NH6 Axial compact fan DC 48V 1.3A 62W cooling fan
These are not the usual cheap fans you'll find online that are only 100mah rated.
These are $100 fans, they were salvaged from industrial battery packs, and wow are they powerful. This fan will make you a fan of fans.
Only a few available. Be careful when you turn this on, it is no joke and could cut off your finger. Aluminum casing and ring terminals on the wires. Check photos 2-5 for the data sheet.