Hollow PyramidThe concept of the Hollow Cube transferred to the Pyraminx but with a newly designed mechanism.
IAS 2005 DCD giftA promotional item ordered by the company Ordina for a small trade fair in 2005. Also used as gift for the DCD 2005.
Jade CubeA special 3x3x3 which comes with becoming a member of Uwe Mefferts Jade Club.
Jade PyraminxSpecial edition of Jings Pyraminx for Meffert's Jade Club members.
JerryA 2x2x2 puzzle in the shape of Jerry's head. (From the Tom and Jerry cartoon.)
Jing's PyraminxThe Jing's pyraminx was created by Adam Cowen and was produced by Uwe Meffert in 2009. It is a pillowed Halpern-Meier pyramid, based on the skewb mechanism.
JokerA 2x2x2 puzzle in the shape of the Joker's head.
KilominxThe corners-only megaminx in dodecahedral shape which went into mass production.