this thing holds a fan (one of your choice) on top of electronics boards ; I made one with a 92mm fan from Enermax powersuply can be cliped easily on pcb I'm sure those things already exist but had none of them by the hand derived from a simple bracket (its code is included within the modules blocks) credit goes to the unknown maker attention: the fan width can not exeed the board width Update: holder with 92mm fan attached to the RepRap Generation 7 board it needs some refinement. one leg collides a little with one screwterminalplease note: the value for the fan width (labeled as diameter) means the outer edge length of the fan's frame it's not the diameter of the fan blade hole nor the screws distant sorry if you got confused this time mounted the fan onto the holder with zip ties (needed it fast) next time a you could change the design to omit the badges for the nuts or make them going over the hole bar width