Product details:

The 2018 Steel goes through a proprietary and patented heat-treating process to harden the barrel so the single-wall, carburized steel barrel increases performance and durability like never before. Made specifically for tournaments and leagues that don't allow multi-wall or composite barrels, the Steel is a hardened beast on the diamond. Pitchers will dread its sound. Specs: Carburized Seamless. Drawn Steel: Increased performance, strength and durability.