Product Description : 1) Material: based on customers' requirements 2) Color: silver/black and other options 3) Connector: ball joint/metal eye/clevis and so on 4) Gas: Nitrogen filled inside 5) Quality: We can provide fatigue test report. Our products can open and close 100,000 times, Not leak oil; Our paint is passed ROHS test Product Feature : 1) Fully self-contained 2) Maintenance-free 3) Low-noise 4) Safety backup during power outages 5) Fast, individual height adjustment 6) Variable, effortless adjustment options 7) No EMFs 8) No fire hazard 9) Mechanical actuation systems, for no leaks