What You GetIncludes 2Pcs 40x40x10mm Cooling Fans and Mounting Screw Sets; We pledge to offer great service & 1-year Replacement Warranty to all of our customers Direct ReplacementThe fan can be used to replace a broken hotend cooling fan for 3d printer; also suitable for battery backup UPS , X-Carve Controller, humidifier and other small appliances that requires cooling or ventilation Long-lasting Ball BearingsThis Brushless dc fan comes with Dual Ball Bearings that has an operating lifetime of 50,000 hrs; It has got seven airflow-optimized fan blades that are designed for achieving better heat dissipation XH2.54-2 Pin ConnectorThis is a two wires cooling fan, red wire is positive(+), black wire is negative (-); wire length 7.87 in.; Opearating Voltage: 14 to 26V (If over 26v, it also can wirk, but will affect the fan life) Fan Specs40 x 40 x 10 mm ( 1.57 x 1.57 x 0.39 in. ) Rated Voltage: 24V Rated Current: 0.04 Amp Po