This is our 4" front coil spring that is included in our Johnny Joint® TJ, LJ and JK 4-door suspension systems. This spring may also be used in JK 2-door applications where an extra 1" of height is necessary to compensate for heavy winches, bumpers, etc. This spring may also be used in combination with our CE-9132F1 to address vehicle lean issues. This spring is a dual rate with a combined rate of 70lbs. And a free length of 22.6". Gloss black powder coated finish. If you need help choosing the correct springs for your Jeep - just call the RockJock sales staff!