New and beautifully septum is made of oxidized brass for a non pierced nose set with a red onyx. Bar size: 1.2mm. Inner ring :10mm. Total diameter: 16mm. Stone size: 3mm. Nickel Free! Available in silver ,brass and gold plated for pierces and non pierced nose. ~~~~ How to use the septum Correctly ~~~~ In order of taking care of your new septum, it's important to bend it to the sides (never up) as little as possible when putting it on and off. ~~~~ How to clean the septum? ~~~~ Brass and silver oxidize naturally with time and with contact to the skin. Wash it with a bit of lemon juice or vinegar to bring back the metal color, shining and bright.