This set of casters has the smaller wheels, only one-inch in diameter. Each wheel is mounted into a heavy cast iron saddle which, in turn, is attached to a thick stem. In short, this set will withstand a lot of weight.
Each stem, which is designed to fit into a socket, is 1 3/4 inches long. The nubbin at the top of the stem will lock into a socket, if one is used. Sockets can be ordered elsewhere in the catalog. The height of the caster from the base of the stem to the bottom of the wheel is 1 1/2 inches.
This is a matching set and in very good condition.