The Groove Tube is the brand name under which the new Dutch collectible puzzle series is being released in the world's largest markets Dael O Ring which includes 3 levels of difficulty. Groove Tube consists of a solid screw-shaped tube and a colored cylinder that is precisely applied to it through a hidden internal labyrinth. The goal of the puzzle is to rotate the cylinder on the tube to find the unique path of the labyrinth that leads to the release of the cylinder.