NONO Bracket - Outside Mounted Blinds Curtain Rod Bracket Attachment (White)
Brand: The NoNo Bracket Company
Color: Dark Brown

This is an example product description1.

Designed, Manufactured, and Distributed by The NoNo Bracket Company Only
Outside mounted vertical blind headrail attachment
Fits up to 1 inch curtain rod
1.5 - 2 inch Adjustment Range
Set of 2 White Brackets