1. The coil is thickened from 1.3mm to 1.4mm to provide more power (users can still use original spring as optional). 2. Shock shaft is thickened from 3.0mm to 4.0mm in order to be more sturdy and prevent bending. 3. Aluminum shock cylinder is light and sturdy, spring retainer is tightly sealed to prevent oil leaking. 4. Two-section spring design avoids bending due to long-term compression. 5. Silicone oil is filled with smooth travel. 6.Aluminium 6061 T6 is a light material anodized for longer durability, corrosion resistant and aesthetics. It has a high tensile strength for greater durability when doing extreme RC action 7. The damper top uses special delrin collar, and the ball end head length is 8.0 mm