Arabic Mathematical Double-struck Zain (U+1EEA6) is a Unicode other letter from the Arabic Mathematical Alphabetic Symbols block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class AL (right-to-left (Arabic letter)), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𞺦 or 𞺦. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.