The Thomas & Betts Size 27” Deltec Cable Support Systems CSS-270 come in a pack of 25, with each unit having a tensile strength of 250 lb. These heavy-duty cable ties are made of acetal material in a black color, with a natural finish. They are self-locking, UV resistant, and feature a 27-inch length and 1/2-inch width. Manufactured in the United States by the trusted brand Thomas & Betts, these cable ties are designed for industrial use and provide reliable support for cables and cords.