Hercules carries a wide variety of turning vanes and vane rail, in both 2" and 4" sizes. We manufacture our own style, and also offer Ductmate's ProRail and Sheet Metal Connectors' EZ Rail.  Single blade vane rail by Duro-Dyne can be found under the "Sheet Metal Specialties" category. We also represent Aero-Dyne "High Efficiency Profile" turning vane and rail. For more information, visit their website at www.aero-dyne.net