The Kit-Extension Fields PEK 46165300 features a 5-inch vent diameter, specifically designed for use with Bradford White water heaters. This extension kit is crucial for ensuring proper venting and compliance with ANSI and UL standards. Constructed from durable materials, it provides long-lasting performance and resistance to environmental factors. The kit comes with all necessary components for straightforward installation, making it an ideal choice for service technicians and homeowners alike. Enhance the efficiency of your heating system with this reliable extension kit.