Code point
U+27EA
Glyph appearance depends on your fonts.
U+27EA
PsU+27EA MATHEMATICAL LEFT DOUBLE ANGLE BRACKET is a Unicode 16.0.0 character in the Open Punctuation category. It belongs to the Miscellaneous Mathematical Symbols-A block.
Choose the representation you need, then copy its value.
U+27EA
10218
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⟪
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E2 9F AA
27EA
000027EA
%E2%9F%AA
\u27EA
\u27EA
\u27EA
\27EA