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1. a ring of rubber or plastic or a metal eyelet designed to line a hole to prevent a cable or pipe passed through it from chafing
2. a ring of rope hemp used to stuff the gland of a pipe joint
3. Med a small tube inserted into the eardrum in cases of glue ear in order to allow air to enter the middle ear
4. Austral informal a young or inexperienced surfer
A metal or plastic eyelet which provides a reinforced hole for attachment.