The Supco DS3 Plastic Flex Duct Saddle Strapping/Hanging System is a pack of 100 duct straps made of durable plastic material. Designed for HVAC ducting and refrigeration systems, these straps by SUPCO provide a secure and reliable way to hang and support flexible ducts. The model DS3 ensures a quality product that meets professional standards in the industry. Whether for commercial or industrial use, this system offers a practical and efficient solution for managing HVAC systems.