  We present the results of three observations of shell-type supernova remnants
observed by BeppoSAX. Two of the remnants (N132D and Cas A) are oxygen rich
supernova remnants. They were observed during the PV phase. SN1006 was observed
during A01. For SN1006 we present preliminary results on the abundance
measurements based on the emission from the center of the remnant.
