Washer DIN137B Material: Steel, Stainless Steel Size: 3mm-36mm Surface: Black, Phosphated, Zinc Plated Excellent quality and competitive priceMaterial: 65Mn(that's AISI 1065 equivalent), 2Cr13, or as per customer requirementsSize: 3mm-36mmSurface: Black, Phosphated, Zinc Plated Wave washer DIN137B