Pan-Steel" Retained Tension Ties speed up installation with a unique self-locking head design that locks into any part of the stainless steel tie. Plus, the patented locking head design provides the highest rated tension in the industry, fastening tightly to high-vibration armored cable, pipe, tubing, conduit, rubber boots, heat shields and more. Light-heavy cross section, Max bundle diameter: 4.0in, 18.5in, Tensile strength: 1000, 50pc.