This is an axial fan, 4010 size, that means 40mm x 40mm and 10mm thick, which is I believe the size that the Crealty printers typically use for the extruder hotend cooling fan(s) (at least the Ender 3, I think the Ender 5 as well, I don’t know about other models, probably) – but check your printer’s fan size and specification before buying.
24 Volts DC, 150-200mA.
Brand may vary from that shown.
Wires may have connector or be bare tinned.
Measures 40mm wide, 40mm high, and 10mm thick.
The mounting holes are 4mm diameter and spaced 32mm apart.