Set of holders for water tank storage units for an emergency vehicle
FIG. 1 is a front perspective view embodying our new design; 
     FIG. 2 is a side elevation view as shown from the left of FIG. 1; 
     FIG. 3 is a front elevation view; 
     FIG. 4 is a side elevation view as shown from the right of FIG. 1; 
     FIG. 5 is a top plan view; 
     FIG. 6 is a bottom plan view; and, 
     FIG. 7 is a rear elevation view. 
     The broken lines shown in FIGS. 1, 3, 5, 6 and 7 are for illustrative purposes only and form no part of the the claimed design.