The clear double flare retainer is hand blown by Gorilla Glass. They have a small micro-flare on the end that allows them to be worn without an o-ring. Gauge tolerance is +-0.1 millimeter. Please note these are glass and can break if forced to bend. Not recommended for athletic or violent activities. Choose your size below.
Note: We recommend cutting the heat sealed bag with scissors and not tearing it open. The plastic stretches easily and may put stress on smaller glass items.