A solid Brass Castor with a 'grip neck' fitting, sold in packs of two complete with two sockets Easy to fit just drill a 3/8" hole, hammer the socket in, then slide the castor into the socket.
'Height' is the distance from the bottom of the socket to the bottom of the wheel.
Wheel 25mm - Height 35mm
Wheel 32mm - Height 45mm
Wheel 38mm - Height 51mm
The socket is the same as used by the normal Black Nylon castor, so this castor makes a very stylish replacement.