Designed to replace the stock rubber pads. Use them to adjust the ride height on the rear of your e30, e36 318ti or z3. Each set includes 3 pairs of pads of varying thickness (3.5mm, 5mm & 6mm). Use the thinnest pad for the lowest setting, or stack all 3 to raise the rear almost 15mm. We use these to corner balance our spec e30 race cars.