NEW TREATMENT ADDED: from now on the 3D Printed Ergonomic Designs can also be Vapor Polished beside the standard Tumbling. Due to the Vapor Polishing the surface of the JNada, JNaja, JNamo and JNata is way smoother and the color is different. Here are some examples: https://www.velv-or.com/blogs/worldofvelvor/new-treatment Please check ou