Pan-Steel" Polyester Fully Coated Cable Ties speed up installation with a unique self-locking head design that locks into any part of the tie. Plus, 316 stainless steel is wrapped in UV-resistant, halogen-free, low-smoke Polyester to promote worker safety and reliability in corrosive, high-vibration, temperature-extreme environments. Heavy cross section, Max bundle diameter: 4.0in, 14.3in, Tensile strength: 1112, Red, 50pc