Connecting rings made of stainless (surgical) steel with a diameter of 8 mm and a metal thickness of 1 mm. The rings are made of stainless steel type 201.
The stainless (surgical) steel alloy from which the components are made is referred to as SAE 201. In addition to iron, as the main component, it usually contains around 16-18 % chromium and 5.5-7.5 % manganese and 3.5-5.5 % nickel. It is a type of stainless steel, which is commonly used, for example, as a part of steel inserts in kitchen utensils, as a basis for steel car frames (doors, roofs) and can also be found in insulating windows
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