1: 3000 PSI high pressure water gun body, brass fitting M22-15 Thread 2: It is specially for Sun Joe SPX3000 hose, for other hose please make sure it will fit M22-15 Thread, if not, do not buy. 3: M22-15 Thread inlet fitting (inside diameter 15mm) 4: Perfect replacement car wash gun for Sun Joe SPX3000 hose 5: 1/4 inch outlet quick disconect fitting