  We compute the width and shape of the EPR and tunneling resonances due to
dislocations in Mn-12 acetate crystals. Uncorrelated dislocations produce the
Gaussian shape of resonances while dislocations bound in pairs produce the
Lorentzian shape. We stress that the uniaxial spin Hamiltonian together with
crystal defects can explain the totality of experimental data on Mn-12.
