I created a 3D model of a Chinese product. Made on the eye, maybe someone will be useful. The dimensions are visible in the photo. If you want to change the size email me or edit SolidWorks file(which I also had). Also, for ease of printing, I divided the part into parts that can then be glued together.
Version 2: changed the radius from 10 to 14 mm and the wall thickness was increased to 6mm(it was 2mm)