FOURTRACK MODELS Fourtrack Models : 7mm Scale : FourTrack Models Products : Accessories : Castings Mouldings & Turnings from our Kits : Rolling Stock Parts : Ventilators - Roof Castings Info. Product info. WF7713 Vent - CR Trumpet type - single View Whitemetal Casting WF7712 Vent - roof - single View Whitemetal Casting WF7714 Vent - roof - single View Whitemetal Casting WF7711 Vent - Torpedo - 12 off View Whitemetal Casting WF7715 Vent - Torpedo - 12 off View Whitemetal Casting WF7716 - L&YR trumpet style - single View Whitemetal Casting