This is a spare part for a tent I once got rid of. I believe it's a genuine Nemo part, a repair part for when a pole broke during high-altitude mountaineering. I've never used it. Weight: Approximately 11.3g Length: Approximately 13cm Inner diameter: Approximately 11.5cm Outer diameter: Approximately 13.1mm Aluminum thickness: Approximately 0.7mm I think it can be used for other things if the diameter matches. Thank you.