Fan anti-vibration sleeves are a key ingredient of silent PCs. Several high-end PC cases come preinstalled with these, or they're available in the market for reasonably cheap, as they are usually just molded silicone or rubber. Sharkoon went a step forward and introduced magnets-mounted vibration dampening with the Anti Vibe Magnetic fan frames. Each of these rubber frames have eight magnets enclosed (two in each corner), that help the fan to stick to the metal case frame, without screws. This dampens vibrations further, as they are not transferred between the fan and the case through screws or bolts. Sharkoon however, does not recommend using these frames near hard-drives as the magnets could interfere with their normal operation, or even damage them. Available in 80 mm and 120 mm sizes, the frames are priced at 4.99 and 5.99 Euro respectively.