COMPRESSED AIR MAINTENANCE UNIT - The compressed air water separator is an efficient maintenance unit with oil or water separator filter and German quick coupling for use on compressors, compressor tools. USAGE - 1 or 4 BSP Compressed Air Filter Water Separator Oil Separator for Compressor Water Separator Can filter small particles, keep the air clean, circulating compressed air can remove dirt and condensation. MATERIAL AND APPLICATION - The connector is made of copper, sturdy and durable. The compressed air maintenance unit is suitable for various occasions, to connect the compressor or the compressed air line, easy to install. SPECIFICATIONS - Compressor water separator size is 10x10x4cm or 3.94x3.94x1.57in, internal thread: 1 or 4in. Advantages and Services - Compressed air filters extend the advantages of filters by differential pressure drainage, when the machine stops working, it starts to drain water. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.