About this item RECYCLABLE MATERIAL & FROSTED FLOOR - Frosted floor, increases resistance, Easy to hold, Will not scratch. Eco-friendly material ?non-harmful material, molecular structural stability, impact resistance, avoid used for a long time wear deformation cause performance degradation. EASY TURNING & SMOOTH PLAY - Superior Corner Cutting, Tension adjustable. Difficult to pop, Good control of the cube, Excellent stability. The Cube's internal corners are slightly rounded, which makes it far easier and quicker to turn. Built-in spring makes puzzle cube more flexibility and better hand feel. The design of 1-2mm axis distance setting to prevent dropping of module and clashing during the rotation of the magic cube puzzle.