These are handcrafted and cast with resin, just like other artisans you will see for sale at much higher prices. They come with a fabulously well-sculpted shape and stem (shown in photographs) which is MX and MX compatible. These are also made in the OEM profile with R4 height, so will match many popular sets perfectly.
Note: These are handcrafted, sculpted, and molded. As such, each keycap may have slight differences and variations from order to order. They may contain minor imperfections that may be perceived by some as "errors," however these are perfectly normal and present in any other resin-casted artisan keycaps.