Cameron Fuller have two different sizes of wrought iron curtain pole rings:
NOTE that these sizes are the curtain pole sizes and not the actual ring sizes !
all of which are available in the following finishes:
The 19mm rings are available in two variants, the standard rings and passover curtain pole rings which are used on the Cameron Fuller bay window passover system.
The illustration below shows how the passover brackets and rings system works.
Interested in the Cameron Fuller Bay Pole system.
I sell the Cameron Fuller range as separate components.
Tip use the search box to find other parts such as the poles, brackets and finials.
For technical information please visit the Cameron Fuller web site.