Rubik 4x4x6

a.k.a. TomZ 4x4x6 Cuboid
Purchased from Mefferts; made by the Now Store, Hong Kong, 2012.
(plastic, 2.5" x 2.5" x 3.5";
orange opposite red, blue opposite green, yellow opposite white)

The shape can change quickly; shown below are three consecutive 90 degree turns. Solution steps are outlined on the Rubik's Ultimate Solution Page.

Further Reading
Jaap's Page,, from:
Ultimate Page, from: