USTF97B3324HW is a DC Brushless Blowerfrom US Toyo Fan. It has an airflow of 25.4 CFM, Acoustical Noise of 52 dB (A), RPM of 3600. The frames are Black PBT (UL 94V-0), bearings are ball, and impeller are made UL94V-0 Plastic. It measures 3.827 x 3.717 x 1.299 in. thick (97mm x 94mm x 33mm thick), and weighs 6.35 oz (180g). The fan operates at 24 VDC (7.0 to 27.6), at a temperature range of -10° to + 70° C. Its insulation is Class A with a resistance 10 Megohms min @ 500 VDC of and dielectric strength of 500 VAC for 1 minute. Termination are through lead wires (UL 1007, AWG24 or equivalent). The fans meets UL, CSA, and CE and impedance and polarity protected.