Link connector made of stainless (or surgical) steel type 304 in the shape of a circle with dimensions 6 x 9.5 x 0.8 mm with holes for a thread with a diameter of 1 mm. The link connector is plated with high-quality vacuum plating in the appropriate colors, and since the surface of the link connector is not hypoallergenic stainless steel but metallic paint, the link connector can cause allergic reactions in contact with skin to people more sensitive to metals.
The stainless steel (surgical) alloy from which the beads are made is referred to as SAE 304 (also known as A2 stainless steel, or 18/8 stainless steel). In addition to iron, as the main component, it usually contains around 18 % chromium and 8 % nickel. Detailed information on the composition and properties can be found at English wikipedia.
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