Invisible variation selector number 252, placed after a character to request an alternate glyph shape, used for ideographic variation sequences.
U+E01EAVARIATION SELECTOR-251U+E01ECVARIATION SELECTOR-253U+E01E9VARIATION SELECTOR-250U+E01EDVARIATION SELECTOR-254U+E01E8VARIATION SELECTOR-249U+E01EEVARIATION SELECTOR-255U+E01E7VARIATION SELECTOR-248U+E01EFVARIATION SELECTOR-256U+E01E6VARIATION SELECTOR-247U+E01E5VARIATION SELECTOR-246U+E01E4VARIATION SELECTOR-245U+E01E3VARIATION SELECTOR-244240 characters in the Variation Selectors Supplement Unicode block, from number 236.