  We show that the N=1 supersymmetric SU(N) gauge theory with 2N flavors
without superpotential has not only the standard Seiberg dual description but
also another dual description involving two copies of the so-called T_N theory.
This is a natural generalization to N>2 of a dual description of SU(2) gauge
theory with 4 flavors found by Csaki, Schmaltz, Skiba and Terning. We also
study dualities of other N=1 SCFTs involving copies of T_N theories. Our
duality is the basic operation from which a recently-found web of N=1 dualities
obtained by compactifying M5-branes on Riemann surfaces can be derived
field-theoretically.
