1. Material: X46Cr13 /4Cr13 (ferrum immaculatum), 20MnCr5/20CrMnTi (ferrum admixtum) nativus
2. Duritia: HRC54-60.
3. Diameter: 1.0mm usque ad 28mm;extra diametrum: usque ad 1800mm.
Distinctum annulum moris multis notationibus customizare possumus, ut CPM, ZHENGCHANG, FAMSUN, BUHLER, YEMMAK, BAHOO, YULONNG, IDAH, CPP, OGM.