Opened but never used.TWPro MB - Pipe 500mm - Ø 125 (37-125-011)National Flues proudly presents the TWPro MB 500mm chimney flue pipe, engineered to address the needs of modern heating systems. This premium flue pipe, ideal for wood stoves, gas boilers, and oil appliances, combines robust construction with state-of-the-art thermal insulation. With a reputation for dependable performance in both domestic and trade installations, our flue pipe meets crucial safety standards including HETAS and CE certification. Optimize your heating system with this TWPro MB chimney pipe is ultimate in quality, durability, and efficiency.