https://www.specflue.com/catalogue/flue-pipes/specvit/125mm/bends-and-tees/specvit-125mm-offset-section-50mm/
Specvit 125mm Offset Section (50mm) : Specflue
Specflue established in 1992 provides industry leading products and services to the Flue, Chimney, Renewable and Stove industries
offsetsection