Product name:Home fitness rower hydraulic cylinder accessories.Suitable for rowing machine, homefitness.Premium Material and Technology: High quality steel, light weight, high hardness, no rust and corrosion resistance. High precision CNC technology.Function: Rowers Steering Damper can provide better stability, reduce stepper fatigue and eliminate headshake, improve lap time.Notice: After installation, turn the head to the very right and very left to check whether there is enough room for the activity of steering damper or not.Specification:Color: BlackMaterial: SteelSize Chart:As you choose:Hole distance 330mm or 390mmPackage Includes:1 Piece Hydraulic Cylinder AccessoriesNote:1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping