This PC fan has 7 pieces of big blades which provide strong cooling capacity. Hydraulic structure， full copper coil and double seaming workmanship， all exquisite detail for bringing user pleasant experience.Features:Hydraulic structure， ultra quiet.Full copper coil， more durable.Double seaming workmanship， avoid deformation.7 pieces of big blades provide strong cooling capacity.2000r / m to 2500r / m high speed rotation， more effectively cooling PC.Specifications:Bearing type: Hydraulic bearingSupport CPU: For AMD， for Intel 775 1155Speed: 2000r / mNoise: 20DBService life: 30.000 hoursVoltage: 12VMaterial: Aluminum and PCColor: BlueItem size: 12.0 * 5.3cm / 4.7 * 2.1in (D * H)Item weight: 183.0 g / 6.5ozTotal size: 12.2 * 12.2 * 6.0cm / 4.8 * 4.8 * 2.4in (L * W * H)Total weight: 247.0g / 8.7ozPackage list:1 * Computer Fan1 * Bracket1 Pouch * Accessory