Noctua. A name that should be familiar to anyone who has been around the PC building industry for any amount of time. Known for their high-quality products as much as they are for their "unique" fan color scheme that provokes a love/hate response from most users, Noctua is a leader in aftermarket PC accessories. And while Noctua provides many options with regards to standard fan sizes like 120mm x 25mm and 80mm x 25mm, they also offer quire a few fan size options for less common applications.