US D281011 S
FIG. 1 is a perspectiive view of a mouthpiece for a spirometer device showing my new design;
FIG. 2 is a side elevated view of the mouthpiece depicted in FIG. 1;
FIG. 3 is a end view of the mouthpiece of FIG. 1; and
FIG. 4 is a view of the opposite end thereof.