Code point
U+2428
Glyph appearance depends on your fonts.
U+2428
SoU+2428 SYMBOL FOR DELETE RECTANGULAR CHECKER BOARD FORM is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Control Pictures block.
Choose the representation you need, then copy its value.
U+2428
9256
␨
␨
E2 90 A8
2428
00002428
%E2%90%A8
\u2428
\u2428
\u2428
\2428