The Blue Bottle Cap Kit takes the acclaimed Blue Bottle and Bottle Rocket Stage One microphones to even greater sonic heights. This innovative collection of eight interchangeable capsules adds an amazing array of tonal characteristics and pickup patterns to your Blue Bottle or Bottle Rocket Stage Once mic. The Bottle Cap Kit delivers a level of performance and versatility that is simply not achievable with any other microphone, anywhere. Get the most out of an already incredible microphone with the Blue Bottle Cap Kit.