FIG. 1 is a perspective view of a sprinkler of the design.

FIG. 2 is a front elevational view of a sprinkler of the design.

FIG. 3 is a rear elevational view of a sprinkler of the design.

FIG. 4 is a left side elevational view of a sprinkler of the design.

FIG. 5 is a right side elevational view of a sprinkler of the design.

FIG. 6 is a top plan view of a sprinkler of the design.

FIG. 7 is a bottom plan view of a sprinkler of the design; and,

FIG. 8 is a perspective view of a sprinkler of the design in a position of use.

The broken line showing in FIG. 8 is included for the purpose of illustrating and forms no part of the claimed design.