These O-rings / Rubber Seals are used with the Smok TFV4 MINI Tank found here. You can choose from a selection of colours. This kit consists of 3 complete sets of rubber seals.
Due to constant screw / unscrew of your electronic cigarette tank / clearomizer when refilling, rubbers tend to wear over time and when replacing the tank / clearomizer glass it is also advised to replace the rubbers to ensure no leakages occur which can loose costly eliquid inside the tank.
Please Note!! TFV4 MINI Tank Included with the O-rings / Pictures are for illustration purposes only.