See photos. This Worcester Cuttable Flue Extension is the perfect addition to your GB162 Boiler. With a 500mm length and 80/125mm diameter, it is designed for easy installation and convenient use. The storage tank water heater is compatible with NG (Natural Gas) power source and features a 360-degree rotation, making it a versatile choice for any home or room. The flue extension is constructed with high-quality materials that ensure durability and longevity. It is dustproof, vented, abrasion-resistant, and compact, making it a great option for whole house, wall, or indoor mounting. This product is ideal for anyone who wants to upgrade their heating system and enjoy the benefits of a reliable, efficient, and long-lasting water heater.