Code point
U+339B
Glyph appearance depends on your fonts.
U+339B
So<square> 03BC 006DU+339B SQUARE MU M is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+339B
13211
㎛
㎛
E3 8E 9B
339B
0000339B
%E3%8E%9B
\u339B
\u339B
\u339B
\339B