M2 (2mm), M2.5 (2.5mm), M3 (3mm), M4 (4mm), M5 (5mm), M6 (6mm), M8 (8mm), M10 (10mm), M12 (12mm), M14 (14mm), M16 (16mm), M18 (18mm), M20 (20mm). These washers are made from A2 Grade stainless steel, providing excellent corrosion resistance and durability.