Code point
U+3386
Glyph appearance depends on your fonts.
U+3386
So<square> 004D 0042U+3386 SQUARE MB 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+3386
13190
㎆
㎆
E3 8E 86
3386
00003386
%E3%8E%86
\u3386
\u3386
\u3386
\3386