These 80mm 24V DC fans are good for cooling LulzBot TAZ and Mini control boxes, REPRAP electronics projects, and other electronics projects.
3 and 4 wire fans work fine in 2 wire fan applications like a LulzBot control box, you just don’t connect the 3rd and 4th wires. Here’s a good article explaining 2 3 and 4 wire fans
Sanyo Denki 80x80x15 9ga0824P7S001 4 wire, wires 300mm long, no connector, 24V DC
Sanyo Denki 80x80x15 9ga0824H7001 3 wire, wires 300mm long, no connector, 24V DC
Kysan 80x80x15 69866 2 wire, wires 90mm long with female pins, 24V DC