nodeko t-stopper for I-Beam curtain rails.
To the best of best of my knowledge these will fit all traditional brass and aluminium I-Beam curtain tracks
NOTE sold in quantities of 1, photo for illustration.
The photo below shows these runners on a brass I-Beam rail along with the corresponding end stop with eye.Also pictured is the Goelst Cross Hook which may suit some installations. The two hooks are easily swapped over.
The video below shows how well these end stops with eyelet fit traditional brass curtain rails.