Full tap attenuation force 36 levels adjustable spring rate (F) 22.0 lbs (10 kg), free length (F) 7.1 inches (180 mm) (R) 7.1 inches (180 mm) adjustment width (F) 2.8 inches (70 mm) (R) 4WD cannot be installed. Please be sure to ask a specialist for installation. About the product image *The actual color of the product you receive will be red (only the brackets are black). We appreciate your understanding. Note: Please read the product will be shipped within 2-3 days. Regarding the warranty, we provide a 1 year warranty within the normal usage method. If the product is not due to the customers circumstances, such as damage in shipping, a different product from the order, a variance of the number of pieces or manufacturing defects, please consult us within 7 days after receiving the product. We will respond to exchanges, refunds etc. The above responds will be responded after the product has arrived to us, after we confirm the condition of the product. Price does not include installation fees. We do not provide installation or after-sales service. Furthermore, please note that it will not accommodate any claims of injuries due to aging, or functional issues. In addition, we cannot be responsible for any damages, accidents, or any other physical disorder that has been lacked for daily inspection and maintenance management. The customers daily maintenance inspection obligation is defined by road security standards. We do not guarantee the burden or any costs associated with receiving the warranty (removal rate, related workshop, shipping cost, inconvenience or loss caused by unable to use your vehicle). We do not accept business trips, repairs, or installation even during the warranty period. We appreciate your understanding. Thank you for your understanding. Product specifications may change without prior notice in order to improve quality.