This product was first created by German designer Fritz Gruber in 1993 and applied for US patent. The patent expired in January 2002. There was a mass-produced version, but it has been discontinued for about 20 years. There should be no legal and moral risks, so it is directly reproduced here: TP Refer: https://twistypuzzles.com/app/museum/museum_showitem.php?pkey=1024
Reminder: This Cube was glued when assembled, so it is recommended to NOT use it violently when solve it. 3D Printed, processing time around 7~15 days.
