Helicopter Cube 4x4 The Gan 357mm cube features

The Gan 357mm cube features an "octopus core

Carbon fiber is a kind of special textured stickers in black applied on a stickerless cube give it a reverse color scheme like a phantom look

A nice addition to a classic mod 3x3

adding to its challenge

Helicopter Cube 4x4 The Gan 357mm cube featuresHelicopter cube is an edge turning puzzle and has a interesting twist to it as the cube the pieces can jumble when 2 adjacent edges are turned at a certain angle. The puzzle was invented by Adam Cowan in 2006. Independent from Adam Cowan, another famous inventor Katsuhiko Okamoto created his own variant of this puzzle under the name "Bevel Cube". This is the Japanese color scheme version of the puzzle