Code point
U+291B
Glyph appearance depends on your fonts.
U+291B
SmU+291B LEFTWARDS DOUBLE ARROW-TAIL is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Supplemental Arrows-B block.
Choose the representation you need, then copy its value.
U+291B
10523
⤛
⤛
⤛
E2 A4 9B
291B
0000291B
%E2%A4%9B
\u291B
\u291B
\u291B
\291B