Delta Electronics FFB DC Axial Fans are built for high performance and feature a dual blade as well as a high air flow rotating stator blade. Delta FFB standard DC axial fan series has a plastic impeller and frame, as well as Delta’s maintenance-free ball bearing system. FEATURES Bearing type - ball bearing Impeller and frame material - plastic (UL 94V-0) Lead wires UL 1007 AWG #24 or equivalent Red wire positive (+) Black wire negative (-) Voltage - Rated 24VDC Size / Dimension Square - 120mm L x 120mm H Width 38.00mm Air Flow 190.0 CFM (5.32m³/min) Bearing Type Ball Fan Type Tubeaxial Noise 59.0 dB(A) Power (Watts) 24.00W RPM 4000 RPM Termination 2 Wire Leads