The Box Drawings Light Double Dash Vertical symbol (╎). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Box Drawing.
The quickest way is to copy ╎ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
╎ is U+254E (decimal 9550).
Use ╎ in HTML to render ╎ on a web page.
On Windows you can type it with Alt+9550 (hold Alt and enter the number on the numeric keypad).
Yes — copying is completely free and unlimited, and works right in your browser with no sign-up.