An extrusion attachment for sausage making machines have three .[.connection.]. .Iadd.concentric .Iaddend.tubes with .[.the inner tube defining a first passageway,.]. the space between the inner .Iadd.restrictor .Iaddend.and .[.intermediate.]. .Iadd.second .Iaddend.tubes comprising a .[.second.]. .Iadd.first .Iaddend.passageway, and the space between the outer .Iadd.third .Iaddend.tube and the .[.intermediate.]. .Iadd.second .Iaddend.tube defining a .[.third.]. .Iadd.second .Iaddend.passageway. The diameter of the .[.inner.]. .Iadd.restrictor .Iaddend.tube is small so that meat emulsion passing into the .[.inner.]. .Iadd.restrictor .Iaddend.tube is subjected to a higher pressure than that of the pressure in the .[.second.]. .Iadd.first .Iaddend.passageway. The lower pressure meat material in the .[.second.]. .Iadd.first .Iaddend.passageway is thinly coated on the strand of the high pressure meat material extruded from the .[.inner.]. .Iadd.restrictor .Iaddend.tube. A thin layer of collagen material is extruded from the .[.third.]. .Iadd.second .Iaddend.passageway for deposit on the outer surface of the meat layer extruded from the .[.second.]. .Iadd.first .Iaddend.passageway.