These forged steel O rings have been manufactured for use with Aerial Yoga hammocks.
They have been forged from steel, then machine-ground to a smooth finish to ensure a surface that won't damage your fabrics, and finally electrogalvanised to protect from the elements and prevent rust (and give them a cool gold finish).
These O rings are 80mm in diameter, with an 8mm wire and a WLL of 500kg.
These rings are sold individually but are recommended to be used as a pair.