Perfect for a wide range of fixing applications.Not compatible for substitute in excessive tensile applications.Corrosive Resistant Stainless Steel.Dimensions (approx) -M3- Inner 3.2mm, Outer 7mm, Thickness 0.5mm/ M4- 4.3mm,9mm,0.8mmM5-5.3mm,10mm,1.0mm/M6- 6.4mm,12mm,1.6mmName: flat washerColor: SilverMaterial: Stainless steelQuantity: 200pcsSpecifications: 50pcs each M3 M4 M5 M6Packaging includes: 200* flat gasketOnly the above kit content, different products usually are not included.Note: Light shooting and various reveals could cause the color of the thing within the picture a little bit diverse from the real thing. The measurement allowed error is +/- 1-3cm.