Black metal curtain rings with an internal diameter of 42mm diameter and 36mm internal diameter. The curtain rings are made from substantial 3mm metal with a black protective finish. Item sold to be used with product - Bespoke curtain rail with swollen hammered back end and bespoke brackets However these curtain rings can be used with any curtain rail. The curtain rings are supplied with a black finish and inclusive of all vat and delivery costings. Curtain rings sold per ring.