I think Jusen can give you a satisfactory answer!
Established in 2006, Guangdong Jusen Hardware Precision Manufacturing Co., Ltd. is a high-tech enterprise specializing in the design, research and development, manufacture, sales and service of hydraulic buffer hinges. It is the inventor of new hydraulic buffer hinge, damping hinge, special-shaped hinge and American hinge in China, including: (buffer hinge, straight hinge, high door hinge, heavy hinge, kitchen and bathroom hinge, aluminum frame door hinge) with very complete categories. This mainly depends on the performance of the hydraulic cylinder. Jusen's hydraulic cylinder is independently developed and produced, with national patents, all of which have undergone strict quality inspection to ensure that each hinge can meet Jusen's highest standards. It is worth mentioning that in the opening and closing test, the minimum factory requirement of Jusen hinge is more than 50,000 times, while the national standard is 40,000 times.