A radial compression mechanism comprising: a) a base; b) a plurality of compression dies (20, 20') wherein each of said compression dies comprises: a compression portion comprising; a die working surface having a length from an inlet end and an exit end; an introduction portion comprising; an introduction surface having a length from an attached end to an extended end; wherein the introduction portion is attached to the compression portion at the inlet end of the compression portion and wherein the introduction surface extends at an introduction angle that is an acute angle from the working surface; wherein the introduction surfaces of the plurality of compression dies form an introduction funnel having a funnel surface having no more than a 250μm gap between adjacent introduction surfaces in both an open position and a closed position; wherein said plurality of compression dies (20, 20') are arranged radially with respect to each other to form a generally centrally located cylindrical cavity defined by the working surfaces and having a length from said inlet end to said exit end; wherein the cylindrical cavity has a surface having no more than a 250μm gap between adjacent die working surfaces in both an open position and a closed position; and wherein the plurality of compression dies (20, 20') are coupled to said base and configured to move in unison from the open position, wherein the cylindrical cavity is in an open position having an open cavity diameter, to the closed position, wherein the cylindrical cavity is in a closed position having a closed cavity diameter; wherein said open cavity diameter is larger than said closed cavity diameter; c) a drive mechanism coupled with each of the plurality of compression dies to move each of the dies in unison from an open position to a closed position. a) a base; b) a plurality of compression dies (20, 20') wherein each of said compression dies comprises: a compression portion comprising; a die working surface having a length from an inlet end and an exit end; an introduction portion comprising; an introduction surface having a length from an attached end to an extended end; wherein the introduction portion is attached to the compression portion at the inlet end of the compression portion and wherein the introduction surface extends at an introduction angle that is an acute angle from the working surface; wherein the introduction surfaces of the plurality of compression dies form an introduction funnel having a funnel surface having no more than a 250μm gap between adjacent introduction surfaces in both an open position and a closed position; wherein said plurality of compression dies (20, 20') are arranged radially with respect to each other to form a generally centrally located cylindrical cavity defined by the working surfaces and having a length from said inlet end to said exit end; wherein the cylindrical cavity has a surface having no more than a 250μm gap between adjacent die working surfaces in both an open position and a closed position; and wherein the plurality of compression dies (20, 20') are coupled to said base and configured to move in unison from the open position, wherein the cylindrical cavity is in an open position having an open cavity diameter, to the closed position, wherein the cylindrical cavity is in a closed position having a closed cavity diameter; wherein said open cavity diameter is larger than said closed cavity diameter; a compression portion comprising; a die working surface having a length from an inlet end and an exit end; an introduction portion comprising; an introduction surface having a length from an attached end to an extended end; c) a drive mechanism coupled with each of the plurality of compression dies to move each of the dies in unison from an open position to a closed position.