I honestly don't know. I got it off of amazon for Christmas. But I found it on amazon https://www.amazon.com/CuberSpeed-Sudoku-magic-Transparent-numbers/dp/B01E7GQXZS/ref=sr_1_2?crid=2H67VXMXX5ASQ&dchild=1&keywords=sudoku+cube&qid=1590841503&sprefix=sudoku+cube%2Caps%2C157&sr=8-2