Barb Dia.(Fit Hose ID): 6mm(1/4"); Barb Length(Approx.): 19mm / 0.75"; Overall Size: 31mm x 31mm x 9mm / 1.22" x 1.22" x 0.35" (L*H*T) This coupling has barbed connections on both ends for connecting two hoses at an angle. The barbed shanks create a tight seal on flexible and semi-rigid hoses when used with a hose clamp or crimp sleeve or ferrule (not included). This fitting is made of brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability. Commonly used to connect air, water, fuel, oil, and inert gas lines quickly and easily.