QiYi X-Man Spark v2 7x7 (Magnetic, Ball-Core)

The X-Man Spark 7x7 v2 M is the world's first mass-produced 7x7 with a Ball-Core.

The added corner/core magnetization gives this puzzle more stability than in other big cubes.

If you're a fan of 7x7 as an event, or you just like notable puzzles, the Spark 7x7 v2 M is the perfect choice!