The tubular Necota tower with its hollows and openings was designed to meet cats preferences for dark and narrow, but also high places. The screw-free modular construction is adjustable to the cat’s fitness and state of health. Stacked as a tower, cats can happily climb on it and sharpen their claws directly on the natural hemp cover. As the animal gets older and less agile, the modules can be placed on the floor individually. They are easy to stack and are stable.