1. This piggy back design regarding L kind dampers with reservoir is a superb design the crawler Axial SCX-10. 2. Spring coil size 1.2 mm , as compare towards initial design which 0.9 mm , this revision springs will offer you better performance 3. Shock shaft 3.5 mm dense, its produced by metal . 4. The cylinder applying this dampers is CNC machined with good and oil filled. 5 . Total amount of the dampers is 92mm with good fitting test of its suspension system system system system system and travel. Which includes :