Features： 1、HEAT RESISTANT MATERIAL: These gaskets are made of copper material, heat and high pressure resistant, anti corrosion and durable. 2、MULTIPLE SPECIFICATIONS: These flat washers include 10 common sizes, and different sizes can meet different tightening needs. 3、HIGH COMPATIBILITY: The gasket is highly compatible with the nuts and bolts, and the connection is tight, which can prevent the screw from sliding and tearing. 4、GOOD SEALING: The melting point of copper is as high as 1083℃, which makes the gasket have good electrical and thermal conductivity. 5、CLASSIFIED STORAGE: All gaskets are sorted by size and placed in a sturdy transparent storage box to prevent loss and mixing. Specification： Item Type: Sealing Copper Gasket Material: Copper Quantity: 220pcs Uses: Suitable for indoor decoration, outdoor construction, electrical maintenance, and furniture maintenance. Suitable for electrical connections for household and commercial electrical appliances, automobiles and ships with threaded bolts type connections for power supply. Package List： 25 x Gasket 4 x 8 x 1mm 25 x Gasket 5 x 9 x 1mm 25 x Gasket 6 x 10 x 1mm 20 x Gasket 6 x 12 x 1mm 25 x Gasket 8 x 12 x 1mm 20 x Gasket 8 x 14 x 1mm 20 x Gasket 10 x 14 x 1mm 20 x Gasket 12 x 16 x 1mm 20 x Gasket 14 x 18 x 1mm 20 x Gasket 12 x 18 x 1.5mm