In one particularly useful aspect, the invention relates to an extrusion die for extruding a honeycomb structure having a matrix of straight cell walls defining {TAIL ~ a plurality} of straight cells running generally parallel to the axis of extrusion, and a matrix of cross {HEAD ~ directional or corrugated cell walls} defining a plurality of cross directional cells running generally perpendicular to the axis of extrusion 
In one particularly useful aspect , the invention relates to an extrusion die for extruding a honeycomb structure having a matrix of straight cell walls defining { TAIL ~ a plurality } of straight cells running generally parallel to the axis of extrusion , and a matrix of cross { HEAD ~ directional or corrugated cell walls } defining a plurality of cross directional cells running generally perpendicular to the axis of extrusion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH