4LIFETIMELINES Copper-Nickel Brake Line Kit 1/4" x 25' — 16 SAE Inverted-Flare Fittings, 0.028" Wall Rust-Proof Tubing

Ready-to-install 1/4" copper-nickel brake line coil with 16 inverted-flare SAE fittings for rust-proof, easy-to-flare brake line replacements on cars and trucks.

This complete kit from 4LIFETIMELINES supplies a 25-foot coil of genuine copper-nickel (CuNi) tubing plus a full set of SAE inverted-flare fittings so you can replace corroded brake lines without hunting down extra parts. The CuNi alloy is non-magnetic and resists corrosion that destroys steel lines, while the 0.028" wall thickness balances strength and bendability for both DIY mechanics and professional technicians. It meets automotive SAE and ISO standards and works with common DOT brake fluids.

How does copper-nickel tubing perform compared with steel lines?

Copper-nickel (CuNi) is a non-ferrous alloy that does not rust, so it avoids the pitting and flaking that weaken steel brake lines over time. It provides long-term corrosion resistance in salted roads and coastal environments while retaining the strength needed for hydraulic braking systems.

• True CuNi alloy — not copper-plated steel — so it resists oxidation and rust.
• Non-magnetic construction reduces galvanic corrosion risk when paired with compatible fittings.
• Engineered to meet SAE J527 and ISO brake-line standards for safety-critical use.

Will this tubing be easy to bend, flare, and install?

The 0.028" wall CuNi tubing is softer and more malleable than stainless or carbon steel, making it straightforward to bend by hand or with common spring formers. It accepts inverted flares cleanly with basic hand flaring tools, so you won’t need specialty equipment for most repairs or full-system replacements.

• Accepts single and inverted (double) flares with standard flaring tools.
• Bends smoothly without kinking, simplifying routing around chassis and suspension parts.
• Tube length and flexibility make it suitable for both full replacements and patch repairs.

What fittings are included and which vehicles will they fit?

The kit includes sixteen inverted-flare SAE fittings covering the common thread sizes used on many domestic and import vehicles. That variety lets you adapt the tubing to master cylinders, proportioning valves, wheel cylinders, calipers, and junction blocks without buying extra nuts or adapters.

• Includes (2) 7/16-24 standard, (10) 7/16-24 long, (2) 9/16-18, and (2) 1/2-20 inverted tube nuts.
• 1/4" outside diameter tubing aligns with the common automotive brake-line standard.
• 25' coil provides enough material for multiple lines or complete vehicle systems.

Is this tubing compatible with my brake fluid and pressure requirements?

The copper-nickel line is compatible with DOT 3, DOT 4, and DOT 5.1 brake fluids and is manufactured to withstand the pressures and temperature cycles experienced in automotive braking systems. The inverted-flare connections form reliable, leak-resistant seals when flared and tightened correctly.

• Meets SAE and ISO requirements for brake-line applications.
• Suitable for high-pressure hydraulic braking environments without degradation.
• Install per vehicle service procedures and torque specs for secure, leak-free joints.

Who this kit is for: motorists and technicians who want a long-lasting replacement for corroded steel brake lines, classic-car restorers aiming for reliability without altering period braking geometry, fleet maintenance teams reducing downtime in salt-prone regions, and DIYers who prefer tubing that bends and flares with common hand tools. If you need a single-kit solution that includes tubing and the most-used SAE inverted-flare nuts, this 4LIFETIMELINES set is built to cover most passenger car and light-truck brake-line jobs while resisting the corrosion that shortens steel-line service life.