Fine workmanship and durable in use. Upgrade parts for rc car models. Manufacturered by EAPTS. 100% brand new and high quality. Material: Metal. Optional Size:app. 70mm/80mm/90mm/100mm/110mm/120mm. Package includes: 4 x Aluminum Shock;4 x Spare Spring(other accessories demo in the picture is not included.). Easy to use stable performance.