Control the air pressure in the air helper springs for varying loads and road conditions. Spring performance can be altered as easily as inflating a tire. Made of durable, elastic polyurethane. Per set (not to exceed vehicle's GVWR). The item "JEEP GRAND CHEROKEE WK2 HD HP FIRESTONE COIL AIR BAG SUSPENSION SPRING KIT" is in sale since Tuesday, October 18, 2016.This item is in the category "Vehicle Parts & Accessories\Car & Truck Parts\Suspension, Steering\Coil Springs". The seller is "ozautoparts" and is located in Melbourne. This item can be shipped worldwide.