Specification: Material: Copper SIZE: 17.8x10.5x2.3cm Characteristics: 1. High Quality Copper Material, The Melting Point Can Reach 1083 C. 2. Good Electrical And Thermal Conductivity. 3. All Components Are Housed In A Compact, Transparent Plastic Compartment. 4. Suitable For Oil Pan Plugs, Water, Fuel Oil And Hydraulic Accessories. 5. Suitable For Oil Pan Plugs Of Various Engines, Including Automobiles, Ships, Generators, And Mechanical Equipment. Scope Of Delivery: 60pcsM5 * 9 * 1mm 60pcsM6 * 10 * 1mm 40pcsM6 * 12 * 1mm 40pcsM8 * 12 * 1mm 40pcsM8 * 14 * 1mm 40pcsM10 * 14 * 1mm 40pcsM12 * 16 * 1mm 40pcsM12 * 18 * 1.5mm 40pcsM14 * 18 * 1mm " [Material]: The Gasket Is Made Of High Quality Copper, Which Has Good Strength And Corrosion Resistance, As Well As Good Electrical And Thermal Conductivity. Durable, Rustproof, Easy To Install, Environmental Protection And Other Functions. [Features]: It Can Distribute The Load To Prevent Damage From Being Repaired, And It Can Also Isolate The Steel Screw From The Surface. Washers Are Used To Hold And Distribute The Load On The Threaded Area Of Bolts And Nuts To Prevent Pulling. [Nine Types]: Contains 400 Pieces / 9 Types Of The Most Commonly Used Copper Plates. If The Diameter Of The Hole Is Larger Than The Diameter Of The Mounting Nut, Use A Washer. Practical Washers For Scratch-Sensitive Screw Connections Of All Kinds Of Screws. Washers Are Mainly Used To Reduce Pressure And Friction. [Application]: It Can Be Used For Oil Pan Plugs, Automobile Brake Lines, Fuel Oil, Oil Lines, Hydraulic Accessories, Preload Indicators, Locking And Vibration Reduction, Suitable For Engines, Automobiles, Ships, Generators, Machinery, Etc. [Scope Of Delivery]: A Total Of 400 Pieces Of Copper Washers, 9 Different Types Are Available: ID * AD * Thickness; Quantity: M5 * 9 * 1mm 60pcs, M6 * 10 * 1mm 60pcs, M6 * 12 * 1mm 40pcs, M8 * 12 * 1mm 40pcs, M8 * 14 * 1mm40pcs, M10 * 14 * 1mm40pcs, M12 * 16 * 1mm40pcs, M12 * 18 * 1.5mm40pcs, M14 * 18 * 1mm40pcs.