Code point
U+220C
Glyph appearance depends on your fonts.
U+220C
Sm220B 0338U+220C DOES NOT CONTAIN AS MEMBER is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Mathematical Operators block.
Choose the representation you need, then copy its value.
U+220C
8716
∌
∌
∌
E2 88 8C
220C
0000220C
%E2%88%8C
\u220C
\u220C
\u220C
\220C