Features: _x000D_ The washer is used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. _x000D_ All parts are made of stainless steel material, rustproof and anti-corrosion, strong and durable. _x000D_ Easy to use, just put the gasket into the thread rod and then twist the nut. _x000D_ This kit come with flat washers, spring gaskets and nuts in 5 sizes to meet your different needs. _x000D_ The included plastic box has multiple compartments that keep these parts sorted by size and allow you to easily find the proper one. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Item Type: Flat Washer + Spring Gasket + Nut _x000D_ Material: Stainless Steel _x000D_ Color: Silver _x000D_ Quantity: 630PCS _x000D_ _x000D_ Package List: _x000D_ Flat Washer: _x000D_ 50 x M2 Flat Washer _x000D_ 50 x M3 Flat Washer _x000D_ 50 x M4 Flat Washer _x000D_ 30 x M5 Flat Washer _x000D_ 30 x M6 Flat Washer _x000D_ _x000D_ Spring Gasket: _x000D_ 50 x M2 Spring Gasket _x000D_ 50 x M3 Spring Gasket _x000D_ 50 x M4 Spring Gasket _x000D_ 30 x M5 Spring Gasket _x000D_ 30 x M6 Spring Gasket _x000D_ _x000D_ Nut: _x000D_ 50 x M2 Nut _x000D_ 50 x M3 Nut _x000D_ 50 x M4 Nut _x000D_ 30 x M5 Nut _x000D_ 30 x M6 Nut