• Whenever your job calls for securing round flexible duct to outlets, pipes or fittings, you can do the job better, faster, and at a lower cost using DYN-O-TIES, flexible duct ties. DYN-O-TIES, when properly installed, provide a secure connection of flexible duct manufactured to meet Underwriters Laboratories, Inc. class 1. • To ensure superior performance, nylon cable tie products should be stored in a sealed polyethylene bag at room temperature in at least 50% humidity (recommended 80% RH). Limit the exposure of unused cable ties to extreme heat and cold. Should cable ties be exposed to extreme temperatures and/or extreme relative humidity, store at room temperature and at least 50% humidity (recommended 80% RH) for at least 24 hrs in a sealed bag prior to further use.