This old set of wood casters is in good condition. Each wheel is fastened into a old iron saddle which is attached to a stem. The stem is for inserting into the bottom of the furniture leg. The nubbin at the top of the stem will lock into a socket, if one is used. (sockets can be acquired elsewhere in this catalog.)
Each wheel is 1 1/8 inches round. The stem is 1 1/2 inches long. The height of the caster from the base of the stem to the bottom of the wheel is 1 1/2 inches.
All four casters match with each other.