Spiral Duct Grilles
All "S" style have the curved lip and you must choose the radius size for the flange.
The "U" style or Universal slips into any radius duct in such a way that the flanges always meet flush to the duct. All grilles are designed to be mounted flush to the spiral duct without the need for seperate mounting assemblies.
Normal shipping is 15 working days, 5 day "hot rush" is available for an additional fee.
Not Available in fractional Sizes