The reducing fan collar can be used if you have odd sized fans and ducting. It is most commonly used with fans to vent from two separate rooms - such as two bathrooms. Made of PVC, Aluminium &/or with white coating.
150-125mm Aluminium, 125-100MM Aluminium, 150-100 Aluminium, 200-150MM PVC, 200-150MM Aluminium, 350-250mm, 250-200MM PVC, 250-200MM Aluminium, 300-250MM PVC, 300-250MM Aluminium, 315-250MM Aluminium, 315-300MM Aluminium, 315-305MM Aluminium, 350-300MM Aluminium