STRONG Made of environmentally friendly ABS material, no stickers, waterproof and no fading, surface matte treatment to prevent scratches; Small card corner design, anti-POP ability is outstanding, stable and not messy, difficult to remove; Speed ​​cubes have passed US safety certification; EXCELLENT STABILITY Cross shaft design, freely adjustable, smooth feeling; Anti-sticky groove, smoother and more durable, no longer need to worry about the feeling of the cube after playing for a while; 40% error tolerance, more suitable for children and beginners; MULTI-FACILITY DEVELOPMENT This is a classic puzzle game that allows children to return to tradition, play to learn, and learn to play, stay away from electronic products; Effectively improve your child's concentration, responsiveness, memory, and logical thinking skills; Cultivate your child's patience and feel the sense of accomplishment after solving the problem and increase your self-confidence; Not only for children, but also for adults to relieve stress, SIZE SPECIFICATIONS - 56mm*56mm, main game size, suitable for WCA major competitions; Lightweight up to 80g, light hand, suitable for children, even if you practice for a long time, you will not feel tired; Color upgrading, enhance recognition conducive to rapid restoration; PERFECT GIFT - This is an upgraded version of Warrior W produced by the famous Speed ​​Cube brand "Qi Yi". The brand is endorsed by advertising 3 x 3 x 3 cube world record mats. Your child will definitely like it! This is a classic educational toy that will never go out of style. Suitable for children, adults and the elderly. Hurry up and let your big family play a fun and exciting Speed ​​Cube game. The product is sent as 1 piece.;