It is designed for use as a connecting pipe between your appliance and the flue liner, chimney stack, or twin-wall flue system. Our Stove Offset with a built-in offset of 100mm and a short pipe featuring a built-in sweeping door at the bottom (male end) is a one-part component designed to achieve an offset in your flue system that not only works effectively but also looks aesthetically pleasing with the fewest amount of joints.