Katakana-hiragana Double Hyphen (U+30A0) is a Unicode dash punctuation from the Katakana block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class ON (other neutrals), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as ゠ or ゠.