This property defines the Unicodes which belongs to CJK Radicals Supplement block
Characters like ⺀,⺁,⺂, etc. are listed under CJK Radicals Supplement Block.
117 Characters are present in CJK Radicals Supplement Block starting with the Unicode point U+2E80 that represents the character ⺀.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.