  We show that Seiberg-like duality of $\mathcal{N}=1$ gauge theory coupled
with tensor chiral fields and fundamental chiral fields works if the meson
spectrum built from the tensor fields takes particular form: a) It should be
truncated; b) The $R$ charges of tensor fields $\{R_a\}$ and the truncated
mesons $\{R_j\}$ take very special values. The meson spectrum so that the
duality works is encoded elegantly in the factorization of the polynomial
$y^n-1=\Phi_{+}\Phi_{-}$. Our consideration covers many known $\mathcal{N}=1$
dualities and generates a large class of new examples.
