Sealing key: High-pressure cleaning machine sealing ring and O-ring sealing ring can fit the parts tightly, effectively prevent liquid leakage, and ensure the normal operation of the machine. Accurate adaptation: specially designed for high-pressure cleaning machines and pressure washers, with high matching degree with internal structures and accessories such as nozzles, and fits seamlessly after installation. Material characteristics: mostly high-pressure resistant and corrosion-resistant materials are used, which can withstand the impact of high-pressure water flow, resist the erosion of chemicals such as detergents, and are durable. Kit advantages: suitable for electric models K2, K3, K4, K5, K6, K7, O-ring seal 2.640-729.0 rubber O-ring Functional guarantee: good sealing performance ensures stable high-pressure water flow spraying, maintains stable pressure of the cleaning machine, and makes the cleaning effect uniform and powerful.