What's different about Kochek Attack Hose? Reliability, durability, packability, and available options. From Rubber Lined to Thermoplastic, Special Threads, Color Coding, and Laser Engraving, we've got you covered. Kochek SJP Single Jacket Synthetic Attack Hose has a single-ply extruded tube of synthetic polyurethane lining. The polyurethane tube adheres to the jacket to prevent delamination.