Set of 4 Bassick 3 Wheel Swivel Ball Bearing Casters/Fur. Movers

The listing

They are 5-1/2 inches wide and 2 inches high. The wheels are 1-1/8 inches. There is an indentation in the center to hold furniture/piano legs secure while moving. The patent on these was filed Aug. 20, 1925, and listed as J.A. JOHNSON TRUCK FOR STOVES OR THE LIKE. All in perfect working order.