Material】 Made of aluminum alloy, rust-resistant, lightweight, and durable. 【Function】 Prevents fuel from siphoning into the tank and keeps it contained within the fuel line. 【Sizes】 6mm, 8mm, 10mm, 12mm. A variety of sizes for a variety of applications. 【Compatibility】 Compatible with gasoline, diesel, vegetable/bio oil, paraffin/kerosene oil, etc. 【Application】 Suitable for carburetor and low-pressure fuel systems. Cars, boats, helicopters, motorcycles, etc. Features - Made of aluminum alloy, rust-resistant, lightweight, and durable - 6mm, 8mm, 10mm, 12mm, 4 sizes to choose from - Prevents fuel from flowing back into the tank and keeps it in the pipeline - Compatible with gasoline, diesel, vegetable/bio oil, paraffin/kerosene oil, etc. Caution: Not suitable for methanol, as methanol will generate formic acid when energized, which has a corrosive effect on the product's internal components. Specification Outer Material: Aluminum Alloy Inner Material: NBR Rubber Color: Silver Size: