This brush set contains 5 different brush sizes on a wire ring. These are variable diameter tools you will need for internal cleaning and good maintenance of your airbrush. The set includes 4 variable sizes of brush cleaner/reamers and 1 micro reamer to clean even the hardest to reach areas inside the length of the airbrush. The diameter of each brush is 2mm, 2.5 mm, 3.2mm, 4mm and 5 mm. The brushes are stainless steel with rugged nylon bristles, and contained on a convenient storage ring for easy use. They can be used to clean any style or model of airbrush and gets the job done quickly and efficiently. If you are looking for a brush ring set that includes a wash bottle. If you are looking for a deluxe airbrush cleaning set with wash bottle, and a variety of cleaning instruments.