This 1/2 inch plug is specially designed for the end flange in Berson UV systems. It is used to provide a sealed, safe closure of openings that are not in use and thereby protects the system against leakage, dirt, and external influences. The plug is robust, easy to install, and fits perfectly for maintenance and service work, or for permanent installations where openings must be sealed. Key benefits: Compatible with the end flange in Berson UV systems; size: 1/2 inch; ensures a sealed, safe, and durable closure; easy to fit and remove as needed. Please contact us if you are unsure whether this plug fits your system.