Features: Brand new and high quality Quality material: our washers is aluminium, which have good temperatures resistance, corrosion resistance, and wear resistance. Easy to use: smooth surfaces and edges, very easy installation. Can reduce frictions between fasteners, insulate, prevent loosening and distribute pressure. Easy to store: these seal equipped with a storage box, more convenient to store the seal. Improves work efficiency. Wide applications: aluminium seal perfect for appliances, oil drain line and more. 18 size: 540pcs sealing gaskets assortment, 18 size depending on your needs, you can choose seal with different diameters and thicknesses. Specifications: Material:Aluminium Package Includes: 50Pcs 6mmx10mmx1.0mm Aluminum Washers 50pcs 6mmx12mmx1.0mm Aluminum Washers 50pcs 8mmx12mmx1.0mm Aluminum Washers 50pcs 8mmx14mmx1.0mm Aluminum Washers 50pcs 10mmx14mmx1.0mm Aluminum Washers 40pcs 10mmx16mmx1.0mm Aluminum Washers 30pcs 12mmx16mmx1.5mm Aluminum Washers 30pcs 12mmx18mmx1.5mm Aluminum Washers 30pcs 14mmx18mmx1.5mm Aluminum Washers 30pcs 14mmx20mmx1.5mm Aluminum Washers 20pcs 16mmx20mmx1.5mm Aluminum Washers 20pcs 16mmx22mmx1.5mm Aluminum Washers 20pcs 18mmx22mmx1.5mm Aluminum Washers 20pcs 18mmx24mmx1.5mm Aluminum Washers 20pcs 20mmx26mmx1.5mm Aluminum Washers 10pcs 22mmx27mmx1.5mm Aluminum Washers 10pcs 22mmx29mmx1.5mm Aluminum Washers 10pcs 24mmx29mmx2.0mm Aluminum Washers note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.