T he Steelman Engine Ear is a diagnostic service tool designed for heavy-duty commercial vehicles. Manufactured by Steelman Industries, Inc. (Part Number 06800), this product offers a unique solution for troubleshooting engine issues. While it does not come with a warranty, it is a reliable tool for automotive professionals looking to diagnose and solve problems efficiently. The product also includes a California Prop 65 Warning regarding potential health risks associated with its use.