Size: M10 x 19mm x 2mm /M10 x 0.75" x 0.08"(Inner Dia x OD x T);Inner ring diameter：10mm/0.39"；Material: 304 Stainless Steel 304 Stainless Steel coating for a corrosion resistant finish Prevents a nut, bolt or screw from pulling through the material Fender washers have a larger surface area than standard flat washers We are so confident that our product is the best on the market that we offer a NO HASSLE LIFETIME ., Manufacturer: MroMax