Transparent capacity cup Connect to observe water and oil in the cup. Not easy to overfill, maximum capacity should not exceed 80%. Body material Made of impact-resistant aluminum alloy, painted and treated for use in various complex environments. Inner cup cover Double copper semi-automatic drain, copper filter for effective filtration; strong air permeability and water absorption. High-quality sealing ring included. Filtering function Removes solid particles and condensates from compressed air, extending the life of air tools. Use scenarios - In a spray painting setup to remove moisture and oil from the air before spraying, ensuring a cleaner finish. - In an automotive workshop with pneumatic tools to protect grinders, impact wists, and staplers from moisture and debris. - In a woodworking or maintenance shop to improve air quality and prevent oil/condensate contamination in air-powered equipment. Note: All specifications adhere to the original design: transparent observation cup, aluminum alloy body, copper components, and air-filtering functionality to extend tool life.