HAMILTON S-FM-6MH Plate Caster, Swivel, Cast Iron, 6 in. 6 in, Wheel Width 2 1/2 in, Wheel/Tread Material Iron, Wheel Core Material Cast Iron, Non-Marking Yes, Number of Wheels 1, Caster Brake Type No Brake Included, Tread Shape Standard. Light Industrial Equipment & Tools. This listing is currently undergoing maintenance, we apologise for any inconvenience caused.