Mini nautical swimming tube keychain made of solid brass and copper, attached to a brass, screw-down carabiner.
The swimming tube itself has a polished finish but due to the nature of the material, it will develop a patina.
The diameter is ~44mm ( around 1.7").
The thickness is ~8mm ( around 0.3").
The weight is ~49g.
Please, understand these items are hand made and meant to be keychains or pendants alternatively so small imperfections are possible here and there, just like on the pictures.