Magnums: Fournales are high pressure air shocks which do not have springs like coilover shocks. The Magnum range have chunky 60mm diameter high pressure air filled dampers. These have a chrome top cover and chrome ribbed sliding tube. All Magnums have the air valve for adjusting the internal pressure hidden and accessable by unscrewing the drop down top cover. Adjusting the internal air pressure allows for changing the effective "spring strength" easily. These come with a 2 year warranty.