The MoYu 2×2/3×3/5×5 Core is the same core that comes with the MoYu 3×3 cubes, like the HuanYing, WeiLong, and AoLong. It is also used in the LingPo and AoChuang 5×5.
This core is a brand new core that is non-threaded. It is threaded by the screw when the screw is inserted.