Feature: 1. Flat Washers: The washer can reduce pressure and friction, preventing screws from loosening as well. 2. Various Sizes: Comes with 9 kinds of flat washers, including M3, M4, M5, M6, M8, M10, M12, M14, M16. 3. Practical Use: Can be used alone, can also use in combination with screw and nut, easy and practical. 4. Good Material: Made of 304 stainless steel material, durable with corrosion, ideal for long term use. 5. Broad Utility: Suitable for maintenance, electrical connection, motor vehicle, transportation, etc. Specification: Item Type: Washer Product Model: M3, M4, M5, M6, M8, M10, M12, M14, M16. Material: 304 Stainless Steel Washer Model Thickness (Approx.) Inner Diameter (Approx.) Outer Diameter (Approx.) M2 0.3mm / 0.01in 2.2mm / 0.09in 5mm / 0.2in M2.5 0.5mm / 0.02in 2.7mm / 0.11in 6mm / 0.24in M3 0.5mm / 0.02in 3.2mm / 0.13in 7mm / 0.28in M4 0.8mm / 0.03in 4.3mm / 0.17in 9mm / 0.35in M5 1.0mm / 0.04in 5.3mm / 0.21in 10mm / 0.39in M6 1.6mm / 0.06in 6.4mm / 0.25in 12mm / 0.47in M8 1.6mm / 0.06in 8.4mm / 0.33in 16mm / 0.63in M10 2mm / 0.08in 10.5mm / 0.41in 20mm / 0.79in M12 2.5mm / 0.1in 13mm / 0.51in 24mm / 0.94in M14 2.5mm / 0.1in 15mm / 0.59in 28mm / 1.1in M16 3mm / 0.12in 17mm / 0.67in 30mm / 1.18in . Package List: 100 x M3 Washer100 x M4 Washer70 x M5 Washer70 x M6 Washer40 x M8 Washer30 x M10 Washer20 x M12 Washer10 x M14 Washer10 x M16 Washer