Features:_x000D_ _x000D_ 100% brand new and high quality. _x000D_ Spring washers can prevent nut from automatic loosening, mainly used for occasions with vibration load or alternating load, tighten to prevent loosening. _x000D_ Made of high quality stainless steel material, these washers are wear-resistant and corrosion-resistant. _x000D_ 10 specifications are available: M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, each of type has different quantities. _x000D_ Suitable for electrical connections of domestic and commercial appliances, automotive and marine applications. _x000D_ _x000D_ Specification:_x000D_ Material: Stainless Steel_x000D_ Weight: Approx.17g~54g / 0.6oz~1.9oz_x000D_ Type: 100pcs*M3, 100pcs*M4, 100pcs*M5, 50pcs*M6, 50pcs*M8, 20pcs*M10, 10pcs*M12, 10pcs*M14, 10pcs*M16, 5pcs*M20 (Optional)_x000D_ _x000D_ Package List:_x000D_ 1 set * Wave Washers _x000D_ _x000D_ Note:_x000D_ Please allow slight error due to manual measurement. Thanks for your understanding.