Original break & jump taps. Two types in a set. Polishing after installation will give a beautiful finish. Diameter: Approximately 14mm If you wish to purchase multiple items I have listed, please comment and I will discount the shipping cost. This is handmade, so please purchase if you don't mind minor imperfections. If you have any questions, please comment. I will try to reply as quickly as possible, but please forgive me if I am delayed due to work or other circumstances.