Perfect for a 25mm banger.

Direct lighting does not show the fumed glass, please check second picture for example of non direct light.

Colors and patterns may slightly vary. 

Carb caps act as more than just a lid for your smoke. By creating a vacuum chamber you are lowering the bowling point of your concentrate. A lower boiling point will allow it to turn into smoke at lower temperatures. Carb caps are an essential part of low temp dabbing.