This Vokera Horizontal Flue Kit is 1,000mm (1 metre) in length and is compatible with Compact, Vision, Evolve, and Unica MAX boilers. It features a simple click-fit connection to the boiler and includes all necessary fixings. The kit is finished in white. It is also described as a Standard Horizontal Flue Terminal for the Evolve XF model with 60 mm/100 mm horizontal flue capabilities.