Abstract: An apparatus for producing a homogeneous material from a mixture of a plurality of reactive components is disclosed. Included is an injector having first and second spaced apart end portions. The injector defines a plurality of cylindrical passages each having a predetermined length and a predetermined cross sectional area. The passages have an inlet at the first end portion and an outlet at the second end portion. Each of the reactive components is delivered at a pressure within a predetermined pressure range to the injector. The reactive components are adapted to pass through the passages, exiting the injector at respective flow velocities. A mixing tube having a first end portion, a second end portions, and a middle portion of a predetermined length is also included. The middle portion is located between the first and second end portion. The second end portion of the injector is in communication with the first end portion of the mixing tube.