5 sturdy braces/brackets, they were originally 'height reducers' for a fitted wardrobe but could be adapted for other uses.
This includes several spare poles, including 3 longer ones which could be used to make them taller.
Have a look at the photos. Measurements or other details on request.
braces / brackets + poles (Hillfields BS16)
This offer has been gifted to someone and is no longer available.