Masscool 60mm Case Fan You can count on Masscool to create the world’s best cooling products, and this case fan is no exception. Offering the world’s most advanced cooling solutions, Masscool’s incredible quality, innovative design and incomparable productivity of its products have earned Masscool a legendary status among LAN partiers and extreme PC users. This Masscool Rear Case Fan is your intelligent and affordable choice for extreme cooling power.