Come on sing it. Do you know the muffin fan, the muffin fan, the muffin fan… These are 12VDC 4-3/4” x 1” take out muffin fans. All working, all have short leads, some dusty and some not so dusty. School project? Perfect! Art student? Right in your budget! DIY’ER? Plenty to go around! Most are 9-blade, Cooler Master DC12V 0.3A model number FA12025M 12BPF but don’t be mad if they are a little different. No RPM specs but what do you want, they are true surplus.