AC Infinity AXIAL 1238W, Muffin Fan, 115V 120V AC 120mm x 38mm High Speed, for DIY Cooling Ventilation Exhaust Projects Designed for projects that requires cooling or ventilation; or as a replacement fan for various products. Terminal connectors, includes optional wire-leads cord adapter. For same kit with plug cord and grilles, see model HS1238A-X. Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright High Speed: This model is designed to maximize airflow and can be too loud for some applications. 120 x 120 x 38 mm ( 4.7 x 4.7 x 1.5 in. ) | 100 to 120V AC | Airflow: 110 CFM | Noise: 47 dBA | Speed: 2600 RPM