Barb Dia.(Fit Hose ID): 14mm x 10mm x 10mm (9/16" x 3/8"x 3/8"); Angle: 120 Degrees; Total Size: 48mm x 43mm / 1.89" x 1.69"(L*H) This coupling has barbed connections on each end for connecting three hoses with the different diameter in a straight run.