Hydraulic quick coupling primarily including high-flow quick fittings and high-pressure quick fittings. High-flow quick couplings are typically valve-free designs, which greatly enhance the throughput capacity of quick-change connections. They are suitable for fluid pipe systems with high flow rates and low pressure drops. They can be easily connected and disconnected, and are usually made of copper. High-pressure quick release couplings are generally made of copper, electroplated iron, and stainless steel. They are mainly used in high-flow and low-pressure drop high-pressure hydraulic applications. These quick couplings are not only used in plastics molds or die casting molds, but also in many other industrial markets. They are available in various sizes and provide an ideal connection solution for high-performance hydraulic applications.