This O-ring with dimensions 15 x 3 mm is specially made for Berson UV systems. The O-ring provides a tight and reliable seal between different components, and is especially important for preventing water leaks and moisture from entering the critical parts of the UV installation. It is made of hard-wearing material that tolerates continuous use and demanding operating conditions. Key benefits: Specially adapted for Berson UV systems. Dimensions: 15 mm diameter, 3 mm thickness. Provides a secure and durable seal. Easy to install and replace during service. Please contact us if you are unsure whether this O-ring fits your UV system.