The gun body is made of engineering plastics. The internal structure is made of stainless steel. The scrubber-dryer spray gun has a quick-connect adapter and an M22 (14 mm) connector. The gun head is a 1/4 inch quick connector. The black accessory is the adapter. It is easy to use and detachable. It can be easily installed on Karcher Quick Connect Spray Gun. Nozzle set: five color-coded spray nozzles with red, yellow, green, white and black for spray patterns of 0, 15 , 25, 40 and 65. Multiple Choices: Different angles spray nozzle tips meet your need in different situations, such as watering flowers and plants, washing the car, washing the barrier, wash the roof, and allows you to clean hard-to-reach areas quickly and easily. Application: lt is also designed for turbo nozzle, surface cleaner, water broom , water train cleaner, swivel coupler, foam cannon, pressure washer blaster kit, gutter cleaner attachment.