These are the screw-type T-Bars for when your watch takes this type of bars instead of the usual spring bars. The tubes have a diameter (thickness) of 1.5mm and the screw heads have a diameter of 3mm. There are lengths from 10mm to 30mm and you will receive 4 tubes and 4 screws (2 pairs) of your chosen length. Make sure you measure your existing t-bars correctly before you order, as I do not accept returns for such items. I have included many photos, so you can get a better idea of what you are ordering.
Feel free to contact me for whatever questions you might have.