The Stiffi Mambo Switch Barrel Kit in Blue features a one-piece .695 stepped bore carbon fiber barrel with 4 interchangeable sizing breeches and a rugged nylon carrying case. This barrel utilizes aerospace quality processing and precision-made carbon fiber/Kevlar with the famous Stiffi proprietary micro-jeweled bore. Sizing breeches are designed to join concentrically to the barrel, giving you consistency and incredible accuracy. Test results show the same remarkable low sound output that Stiffi fans have raved about for years. You get the same Stiffi quality and accuracy plus interchangeability. The Stiffi switch is a tournament level barrel that will make your opponents meg for mercy. The zippered switch carrying case has room for 3 barrels and 5 sizing breeches.