The Package Includes: You Will Receive 170 Rubber Washers, Including 7 Common Sizes, 50 Of Which Are 9Mm/0.35Inch; 40 Are 12Mm/0.47Inch; 30 Are 16Mm/0.63Inch; 20 Are 19Mm/0.75Inch; 10 Pieces Of 24Mm/0.95Inch; 10 Pieces Of 27Mm/; 10 Pieces Of 30Mm/1.06Inch. Can Meet Your Daily Needs. Clear Separate Storage Box: These Rubber Gaskets Are All Packed In A Clear Storage Box. The Storage Box Has A Partition, Which Can Classify The Rubber Seals, Which Is Very Convenient For Storage And Selection. High-Quality Material: The Rubber Seal Is Made Of High-Quality Rubber Material, Resistant To Corrosion. Heat, Mineral Oil, Abrasion Resistant, Has Good Waterproofness And Electrical Resistance, And Is Not Easy To Break. Very Soft And Durable, Can Fit And Seal Holes Precisely. The Protective Coil Can Also Protect The Wire And Play A Role In Insulation And Sealing. Rubber In The Middle, So You Can Drill It To Make Your Own Hole. It Is Very Suitable For Sealing Gasoline, Diesel, Lubricating Oil, Water, Air, Gas And Various Chemicals. Doors And Windows, Electrical Appliances, Bearings, Pumps, Rollers, Valves, Hydraulics And Pneumatics, Key Gaskets, Industrial Equipment, Electrical Appliances, Computer Server Hardware, Etc.,"