This product contains 50 pieces of light metal nut washers that have a 6mm inner diameter and a 10mm outer diameter. These washers are made of high-quality metal that is durable, corrosion-resistant, and easy to install. They can be used to secure nuts and bolts, prevent leakage, distribute pressure, and protect surfaces from damage. These washers are ideal for automotive, plumbing, electrical, and general repair projects.