Smart Parts Freak XL Insert  Aluminum  .682 If you already have the barrel Freak or Deadlywind Fiber XL then this insert will complete the set for you. Don't be stuck with the wrong barrel size for your paint. The Freak XL insert offers a full control 8-Inch Diameter that is carefully polished from aerospace grade aluminum alloy. Freak XL inserts are color coded with a durable low friction hard anodized finish and laser etched for quick identification. Note: This is only the insert part of the Freak barrel. The insert slips into the Freak back. If you don't already have one, you will need to purchase a Freak front and rear, a carbon fiber Freak XL or a deadlywind XL to complete your barrel.