You need an knob maybe to repair an old radio ? You can have it ! (This is ready to print) - Other dimensions ? Just sent me diameter outside (mm), diameter shaft (mm) and height (mm). I do the best to keep the volume of material low. - If you need an other design mail it to me and I do the best to create the needed 3D files (this maybe last longer than 10 days). I need the dimensions and sketches or pictures so precise as possible. - Don´t pay before model is ready to print, prise depends on volume !!!