Microcentrifuge tube rack
FIG. 1 is a perspective view of the microcentrifuge tube rack, showing my new design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a right side elevational view thereof; 
     FIG. 4 is a left side elevational view thereof; 
     FIG. 5 is an upper side elevational view thereof; 
     FIG. 6 is a lower side elevational view thereof; 
     FIG. 7 is a bottom plan view thereof; and, 
     FIG. 8 is a vertical cross-sectional view taken in the plane indicated by the line 8--8 in FIG. 2.