8pcs. PITTMAN ERECT-A-WIRE TROLLEY POLE

With Single Cross Arm For One Track.

These 8 manila envelopes are all the same at 8-1/4" x 5-1/2", each stapled and labeled as containing 1 ea. [model train layout] trolley poles. PART NO. 75-31, PRICE $0.35, manufactured by PITTMAN ELECTRICAL DEVELOPMENTS CO., of Sellersville, Penna., U.S.A.

I haven't opened any of the envelopes, so I'm assuming what's inside looks pretty close to what's pictured on the outside. Feels like the thing inside is about 8" long.