Feature:1. This is a soft and flexible O ring assortment kit with simple buckle, so it is quiet easy to install.2. This rubber O ring has many advantages such as no pollution, no radiation, no peculiar smell.3. These O ring sealing gasket can be stored in a labelled resealable box, eliminating the need for organizing and size selection.4. Made of high quality rubber, with high elasticity and sufficient strength, it can make the seal better.5. Mainly used for power supply, control box, power cord socket protection, electrical appliances, motors, tools, automobiles, pumps, furniture, etc.Specification:Item Type: Rubber Assortment KitMaterial: RubberWeight: Approx. 147g/5.2in.Package List:20 x 3 x 1mm20 x 4 x 1mm20 x 4.5 x 2mm20 x 5 x 2mm20 x 6 x 2mm20 x 6 x 2.5mm5 x 13 x 3mm5 x 14 x 2.5mm5 x 17 x 2.5mm5 x 18 x 4mm5 x 22 x 2mm20 x 6 x 3mm20 x 7 x 2mm20 x 8 x 2mm5 x 9 x 2mm5 x 10 x 2mm5 x 12 x 3mm1 x Storage Case