Designed for projects that requires cooling or ventilation; or as a replacement fan for various products. Includes a heavy-duty aluminum fan Dual-ball bearings have a lifespan of 50,000 hours High Speed: This model is designed to maximize airflow and can be too loud for some applications. Dimensions: 120 x 120 x 38 mm Airflow: 110 CFM Noise: 47 dBA Bearings: Dual Ball