Features: Jerry can gaskets become brittle and warped over time, reducing their ability to create a seal and hold liquids inside the 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 cans holding a variety of liquids (gas, diesel, oil and water). Universal seal for jerry cans, suitable for standard 5, 10 and 20 liter versions. Made of environmentally friendly rubber, with no pollution, radiation or abnormal smell. With good watertightness, you can use it in industry or home. No contact corrosion, no pollution medium, no abnormal smell, environmentally friendly. Specifications: Material: Rubber Size: Approx. 5.2x4.5x0.5cm / 2.04x1.77x0.19inches Color: Black Suitable for 20 liters (5 gallon) military specification spout. 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 understanding. Package includes: 10 x Rubber Seal Ring