Chrome-plated steel. Handy for a variety of trim applications. Do it carded. No. 499005: 1/2" O.D. tube size No. 498963: 5/8" O.D. tube size No. 498955: 3/4" O.D. tube size No. 498971: 3/4" iron pipe size No. 498998: 1-1/2" iron pipe drain tube