  We study theoretically the effect of impurity scattering in f-wave (or
E_{2u}) superconductors. The quasi-particle density of states of f-wave
superconductor is very similar to the one for d-wave superconductor as in
hole-doped high T_c cuprates. Also in spite of anisotropy in Delta(k), both the
normalized superfluid density and the thermal conductivity is completely
isotropic.
