Code point
U+257B
Glyph appearance depends on your fonts.
U+257B
SoU+257B BOX DRAWINGS HEAVY DOWN is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Box Drawing block.
Choose the representation you need, then copy its value.
U+257B
9595
╻
╻
E2 95 BB
257B
0000257B
%E2%95%BB
\u257B
\u257B
\u257B
\257B