https://www.overseadia.com/en-US/detail/b3d4095f0ad9ec19401d4ecae9bc5ce2 The Explosion-Proof Spiral Tube is a valuable addition to any facility that handles hazardous materials. This product is designed to prevent sparks and explosions in the event of a chemical reaction or electrical malfunction. The black tube is available in size Qs-22 and is a reliable solution for protecting your equipment and employees.