The ADJRJ roof jack is great to maintain a professional appearance throughout your venting system. This easy to install stainless steel roof jack is used in conjunction with other Noritz N-Vent components adding yet another clean looking durable and moisture resistant piece to your ventilation system. As part of the N-Vent series, this product is UL approved category III venting, and is an integral part of the quick-snap connection system, known for easy installation and forming tight seals. Flashing: A professional looking finish and durable component that helps provide additional protection from harsh weather. The ADJRJ34 concentric venting angled roof flashing is utilized to help seal off penetration junctions from those costly roof leaks. In addition, the piece is part of the N-Vent series so it's approved for tankless and boiler stainless steel exhaust installations, enabling you to know you've made the right choice in both form and function. Features: Stainless Steel Introducing the latest advancements in tankless water heater technology for your home, Noritz tankless hot water heaters are both eco-friendly and energy efficient, providing savings up to 40% in utility costs. Their gas water heaters warm water on demand, which means you'll always have hot water and it will never run out.