Cable ties are used in Irrigation and Low Voltage Lighting systems to organize wires. They are also used to provide strainrelief to wire splices, so the connection doesn't come apart when the wires are pulled-upon. High quality cable ties from the 3M Company, a name you can trust.Black color for sunlight and weather resistance. Indoor or outdoor use.Operating temperature range: -40° F (-40° C) to 185° F (85° C).Resistant to chemicals such as fertilizers, fungicides, herbicides, etc.Self-locking head with heavy double teeth for added strength.UL Recognized (UL File No. E116841).