Sachs is part of the ZF group, who are one of the world&8217;s largest Automotive parts suppliers. Their Chassis Technology division designs & manufactures original equipment components for vehicles from all renowned global manufacturers. Sachs coil springs are manufactured from superior grade spring steel to the same exacting quality as original equipment components. All springs have an advanced Zinc Phosphate & Epoxy Powder Paint surface treatment to prolong life & minimising corrosion. These coil springs are made as a direct replacement for the original part. Although we sell these individually, we do recommend that springs are always replacement in pairs to avoid any imbalance, which could lead to uneven ride height, increase braking distance & fuel consumption.