Feature:1. Corrosion Resistance: Made of premium quality materials, with excellent corrosion resistance, able to resist harsh environments and have a longer service life, reducing the frequency of replacement and maintenance.2. High-Temperature Resistance: Able to withstand high-temperature environments without deformation or damage.3. Multiple Sizes: Available in 5 sizes (10AN-5/8\", 12AN-3/4\", 4AN-1/4\", 6AN-3/8\", 8AN-1/2\") to meet different needs.4. Wide Range of Applications: The hardline tube nut and sleeve fitting has a wide range of applications and can be used in systems such as brake systems, fuel systems, cooling systems, and engine modification, with good adaptability and reliability.5. Easy Installation: Simple tools are all that is needed for installation, without special skills or equipment, saving installation costs and time.Specification:Features:Corrosion Resistance: Made of premium quality materials, with excellent corrosion resistance, able to resist harsh environments and have a longer service life, reducing the frequency of replacement and maintenance. High-Temperature Resistance: Able to withstand high-temperature environments without deformation or damage. Multiple Sizes: Available in 5 sizes (10AN-5/8", 12AN-3/4", 4AN-1/4", 6AN-3/8", 8AN-1/2") to meet different needs. Wide Range of Applications: The hardline tube nut and sleeve fitting has a wide range of applications and can be used in systems such as brake systems, fuel systems, cooling systems, and engine modification, with good adaptability and reliability. Easy Installation: Simple tools are all that is needed for installation, without special skills or equipment, saving installation costs and time.Specifications:Item Name: Tube Nut and SleeveMain Material: AluminumColor: BlackSize: 12AN-3/4"Package Information: Package Size: 12.7*11*2cmPackage Weight: 70gPackage List:1 * Tube Nut1 * Tube SleevePackage List:1 * Tube Nut1 * Tube Sleeve