Titanium One-Piece Chain Earrings $ 4.26 Medical steel stainless steel material, does not change color, does not fade, and does not oxidize. [Size]: 0.8mm thick11mm length4mm ball. Chain length is about 3.8cm [Material]: 316L medical steel, commonly known as titanium steel/stainless steel. [Features]: Anti-radiation, no rust, no fear of sweat, no fear of water, long-term gloss. [Process]: Vacuum electroplating and polishing.