Zinc plated for corrosion resistance Come in a clear, divided PVC storage case •Zinc plated for corrosion resistance•Come in a clear, divided PVC storage caseSizes: Flat washers: 3/16" (50 pieces), 1/4" (24 pieces), 5/16" (15 pieces), and 3/8" (9 pieces) 250 Piece Flat and Lock Washers