V-Cube 4 Cube Toy, White V-CUBE 4 is the 4x4x4 member of the V-CUBE family, perfect for the intermediate puzzler with a difficulty rating of 2.5 out of 5 Four layers of cubies will test your determination and skill Smooth rotation and durability makes this a puzzle that lasts Classic flat design, measures 2.44"x2.44"x2.44", weighs 157g Safe for ages 3 and up