Zinc Plated Steel Flat washers. These are to DIN 125A / ISO 7089 specifications.
Class 10.9 / Grade 8 with a 200 HV (hardness) rating and Cr+3 Zinc plating.
Washer Size (Diameter) is the size of the screw that the washers is for (example: M8 washer for a M8 screw).
