Easy to install and to operate, these pipe fittings can bring you satisfying using feeling. Using sturdy materials, it has good strength and durability, non-deformation, for reliability. Perfect for most different air pipes, satisfy your requirements very well. Features -Color:Black -Material:Copper plated with nickel -Size:3.80X3.50X2.00cm/1.49X1.38X0.79in -Inner diameter: 6mm -Smooth surface and inner wall, these pipe fitting are with craftsmanship makes it safe and reliable. -Our air pipe fitting is sturdy enough with reasonable structure, you can use rest assured. -Sturdy and compact, convenient to carry and store, allowing you to take the quick connect fittings where you want to use. -Air pipe fittings can be easy to install and not easy to fall off, for your better using. -Pipe fittings are suitable for applications, good for most different types of air pipes, very versatile. Package list: 2 x air pipe connectors