This is our 4" front coil spring that is included in our Johnny Joint® JK 2-door suspension systems. This spring may also be used in TJ/LJ/JK 4-door applications where 1" less spring height would be ideal. This spring may also be used in combination with our CE-9132F to address vehicle lean issues. This spring is a dual rate with a combined rate of 70lbs. and a free length of 21.6". Gloss black powder coated finish. If you need help choosing the correct springs for your Jeep - just call the Currie sales staff!