Hangul Double Dot Tone Mark (U+302F) is a Unicode spacing combining mark from the CJK Symbols and Punctuation block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class L (left-to-right), is not mirrored, and has combining class 224 (Left). In HTML it can be written as 〯 or 〯.