Seat Part for a Stroller Trailer for Children or Jogging Stroller

1. Seat part for a stroller, trailer for children or jogging stroller

1 . 1 is a front perspective view of a seat part for a stroller trailer for children or jogging stroller 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 even dash-dash broken lines in the drawings illustrate portions of the seat part for a stroller trailer for children or jogging stroller that form no part of the claimed design. The dash-dot broken lines in the drawing illustrate boundaries of the claimed design.