Code point
U+25AE
Glyph appearance depends on your fonts.
U+25AE
SoU+25AE BLACK VERTICAL RECTANGLE is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25AE
9646
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E2 96 AE
25AE
000025AE
%E2%96%AE
\u25AE
\u25AE
\u25AE
\25AE