Mini fan casing

FIG. 1 is a perspective view of the mini fan casing in accordance with the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a real elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof wherein the broken lines represent unclaimed subject matter.