Barb Dia.(Fit Hose ID): 10mm x 6mm x 6mm (3/8" x 1/4"x 1/4"); Angle: 120 Degrees; Total Size: 44.5mm x 39mm / 1.75" x 1.54"(L*H) This coupling has barbed connections on each end for connecting three hoses with the different diameter in a straight run.