The shock absorber will vibrate quickly on uneven roads to improve safety and make you feel more comfortable Motorcycle shock absorber universal fit for most vehicles. Professional manufacturing,stable characteristics,high reliability High precision parts designed to improve vehicle performance and efficiency. The motorcycle shock-absorbing spring is made of Metal. Name:Motorcycle Absorber Material:6063 Aluminum Total Length:430mm(17″) Eye To Eye Center Length:400mm(15 3/4″) Eye Diameter:12 mm (0.47 inch) Eye thickness :21 mm (0.83 inch) Spring thickness:8 mm (0.31 inch) Spring Width(approx):60 mm (2.36inch?? Max loading: <;=300kg/pair <;=660lb/pair Package included: 2*Shock Absorber 2*12mm copper rings 2*Adjuster