Upright Mount Pulley, Pocket or Rolling Door

Upright mount pulley, marked "37 IN." This style pulley would have originally used as part of pocket door assembly or for a sliding barn door. The wheel rolls smoothly. Item has some surface rust and traces of paint on it.
Overall Measurements: 9(L) x 1(W) x 3(H), wheel measures 2 5/8" diameter.