Features: Jerry can gaskets become brittle and warped over for time, reducing their ability to create a seal and hold liquids inside the NATO jerry can spout. These replacement gaskets are perfect for replacing old gaskets to renew the jerry can's holding power. Our gaskets are a perfect fit for steel / metal UK and European cans holding a variety of liquids (gas, for diesel, oil and water). Universal seal for jerry cans, suitable for standard 5, 10 and 20ltr versions. Made of environmental friendly rubber, with no pollution, radiation and abnormal smell. With good watertightness, you can use it in industry or home. No contact corrosion, no pollution medium, no abnormal smell, environmental friendly. Specifications: Material:Rubber Size:Approx.5.2x4.5x0.5cm/2.04x1.77x0.19inches Color:Black Suitable for NATO 20 liters/liter (5 gallon NATO for tank) military specification for tank/spout. Package Includes: 10x Rubber Seal Ring note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.