Retaining ring DIN1360 Material: Steel, Stainless Steel Size: 20mm-100mm Surface: Black, Phosphated, Zinc Plated Excellent quality and competitive priceMaterial: 65Mn(that's AISI 1065 equivalent), 2Cr13, or as per customer requirementsSize: 20mm - 100mmSurface: Black, Phosphated, Zinc Plated Retaining ring DIN1360