New, Unused Color: Material: Plastic This is an original product, entirely self-designed and meticulously crafted one by one using a 3D printer. Unlike typical 3D printed items, it features built-in bearings, eliminating wobble and providing stability and smooth operation. Due to 3D printing, there may be slight individual variations, and perfect perfection is difficult to achieve. Please understand this beforehand. Easy to assemble! Simply follow the steps in the photos to complete assembly. You can adjust the sensitivity of the rotation with the screw on the upper part of the internal axis. If the rotation is too fast, adjust by turning the screw counterclockwise. We will carefully package the product to prevent damage during shipping. Thank you for viewing.