Stainless steel tube. This is the NARROW (9mm OD) tube for many smaller sausage stuffers. The base diameter of this tube is 1 9/16". PLEASE measure before ordering. The larger base is also available from. C0M 7" long. Fits the LEM 606 1606 and other brands such as Northern Tool, Cabelas and Enterprise. PLEASE measure prior to ordering. Larger base also available.