ITEM NAME:90mm Computer Case Fan, Low Noise Fluid Dynamic Bearing Design Description: Item Name: CPU Fan Cooler Wide-range PWM fan with unique wave-shaped blade design for excellent airflow. Enhanced Bearing, alloy/lubricant combination to reduce the friction within the bearing and achieve a greater efficiency. Package Includes: 1Piece CPU Fan Cooler Before placing an order, please confirm whether our products size is suitable for yours computer. Specification: Speed: 2200Â ±10% Noise: 22 dBA Voltage: 12 VDC Air volume: 48 CFM Life expectancy: 50000 hours Bearing type: hydraulic Fan Size: approx. 90x90x25mm/3.54x3.54x0.98inch Material: copper Package Includes: 1Piece CPU Fan Cooler Note: Please allow 0-1cm difference due to manual measurement.(1cm=0.39inch, 1inch=2.54cm) Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand. Thank you! SKU: DMO0013729577013118.Enhanced Bearing, alloy/lubricant combination to reduce the friction within the bearing and achieve a greater efficiency. Bearing type: hydraulic. Noise: 22 dBA. Wide-range PWM fan with unique wave-shaped blade design for excellent airflow.