Designed for 4" (102 mm) diameter ducting for a secure, stable fit Includes 2 clips Durable Construction Quick and easy to install Prevents duct movement, leaks, or efficiency loss Powermaster 4 Inch Ducting Clips 2 Pack Applications Ventilation Systems: Perfect for connecting fans, vents, or ducts securely. Exhaust Systems: Maintains steady airflow in exhaust setups. Air Conditioning: Supports ducting in HVAC or air conditioning installations. General Ducting: Suitable for dryers, industrial setups, and commercial air systems.