The ornamental design for a lever for faucet, as shown and described.
FIG. 1 is a front view of a lever for faucet showing my new design.
FIG. 2 is a rear view thereof.
FIG. 3 is a left side view thereof.
FIG. 4 is a right side view thereof.
FIG. 5 is a plane view thereof.
FIG. 6 is a bottom view thereof.
FIG. 7 is a perspective view thereof; and,
FIG. 8 is a perspective view of the faucet lever attached to a faucet.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.