★【Package include】40 pcs 1/8" ,40 pcs 3/16", 50 pcs 1/4", 30 pcs 5/16", 30 pcs 3/8", 20 pcs 1/2" Total 210pcs and placed in a complete Box. | ★【Application】Connects to copper, brass, aluminum, or plastic tubing, used to connect lines for air,water,fuel,oil and inert gases in a quick and simple way. | ★【Material】Made of pure brass, ductility at high temperatures, and low magnetic permeability, strong, corrosion-resistant, durable. | ★【Limit level】3000 PSI working pressure, Temperature range of -65°F to 250°F (-53°C to 121°C) | ★【Guarantee】We guarantee that our products are of high quality and affordable. We are committed to providing better service, cherish every customer, and hope you can have a better shopping experience.