Easy to install,no instruction Come with bolts for easy installatio Bracket can work with all Hyperpro steering dampers Specifically designed for sport or road racing bikes Reduce rider fatigue and eliminate headshake,improve lap time Description: Motorcycle Damper Assy Adopting Japanese Standard Oil Seal Technology,experience a comfortable and confidence-inspiring ride ?Cno matter the pavement conditions Large pistons and low viscosity-performance oil allow these shocks to react quickly to impacts and keep the tires tracthe road surface The Eyes Of Shock Has Tensile Strength more than 2000 Kgf. The Damper And Spring designes For Long Durablility (More Than 1 Million Stoke) Specification: Condition:TrichTu Mount 100%Brand New Material:Aluminum AlloySteelPositionOnBike Rear Eye to Eye:280mm(11.02 Inch) Eye Diameter (for mounting bolt):10mm Spring Thickness:7mm Spring Width:64mm Maximum Load:350 kg/800 pounds Total Overall Length(uncompressed):310mm(12.20 Inch) Warranty:2