The PMD4809PMB3-A.(2).GN from Sunon Fans is a 48 VDC square axial brushless DC fan measuring 92 mm × 92 mm with ball bearing, rated 91.8 CFM (2.57 m³/min), with 2 wire leads.
The PMD4809PTB1-A.(2).GN from Sunon Fans is a 48 VDC square axial fan measuring 92 mm x 92 mm with ball bearings, rated 77.0 CFM (2.16 m³/min), with 2 wire leads.