----We have 12.1mm, 13.1mm, 14.1mm, 15.1mm, 16.1mm, 17.1mm, 18.1mm, 19.1mm for your choice.
2. I need the regular model rotary button, not the butotn that pass the needle test, do you have it? ---Of course, we have both of these models for your choice.
3. Can i get the samples? ---Yes, we can provide you with free samples. You can contact us and get free samples.