The 3115PS-23T-B30 (often seen as 3115PS-23T-B30-A00) is a specific model of NMB Technologies AC Axial Cooling Fan, an 80x80x38mm unit designed for industrial cooling, running on 230V AC, featuring a ball bearing, aluminum frame, polycarbonate impeller, 2-wire terminal, and provides ~32 CFM airflow at around 3200 RPM, though it is now generally considered an obsolete part, with replacements available.