The V-CUBE 4 is a 4x4x4 member of the V-CUBE family, designed for intermediate puzzlers. It features a unique 'pillow' design and measures 2.68"x2.68"x2.68". Weighing 157g, this cube offers smooth rotation and durability, making it a lasting puzzle. It is safe for ages 8 and up and is perfect for those looking to test their determination and skill with a difficulty rating of 2.5 out of 5. The V-CUBE products are high-quality rotational 3D puzzle cubes that cater to hobbyists and fans of mind games, providing an impetus to exercise and become more mentally fit and sharp.