Description: Feature: This product is a hydraulic cylinder, also known as an oil pressure cylinder, which can be used as a damper, buffer, and shock absorber for rowing machines. High Quality Material: Made of stainless steel, this hydraulic cylinder is durable and resistant to rust and corrosion, ensuring long term use. Compact Size: With a length of 20cm, this hydraulic cylinder is compact in size but powerful in function. It's easy to install and doesn't take up much space. Package Includes: Each package comes with hydraulic cylinder, suitable for rowing machine, and home fitness. Versatile Use: This product can be widely used in various mechanical equipment such as rowing machines for damping and buffering effects to reduce vibration and ensure smooth operation. Specification: Material: Stainless steel Size Chart: Length: 20cm/7.87inch Package Includes: 1 Hydraulic Cylinder Accessories Note: 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!