1. Good Corrosion Resistance, It Can Be Used in a Humid Environment. 2. Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection. 3. This set is organized by size in a transparent storage case for quick access and protection Color: Black Material: steel Package Contents: 15 x M3 Gasket 15 x Gasket 15 x M5 Gasket 15 x M6 Gasket 15 x M8 Gasket 10 x M10 Gasket 10 x M12 Gasket 10 x M14 Gasket 10 x M15 Gasket 10 x M16 Gasket 10 x Gasket 10 x M19 Gasket 10 x M21 Gasket 10 x M23 Gasket 10 x M25 Gasket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.