Earring back made of 304 stainless (or surgical) steel with dimensions of 6 x 4.5 x 3.5 mm, serving as a counterpart to the studs or hooks. The hole for the shaft, pin or hook has a diameter of 0.9 mm.
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.
Due to the color setting of the monitor, the color of the goods may differ slightly from reality.