The ornamental design for a pulley for surgicalinstrument, as shown and described.
1. Pulley for surgical instrument
1.1 is a perspective view of a pulley for surgical instrument embodying our new design;
1.2 is a front elevation view thereof;
1.3 is a rear elevation view thereof;
1.4 is a left side elevation view thereof;
1.5 is a right side elevation view thereof;
1.6 is a top plan view thereof; and
1.7 is a bottom plan view thereof.
The ornamental design for a pulley for surgical instrument, as shown and described; the dashed broken lines in the drawings show portions of the pulley for surgical instrument that form no part of the claimed design; the dot-dash broken lines in the drawings show boundaries that form no part of the claimed design.