The Food Warmer Accessories by Hatco: Casters, 2 in diameter, swivel (adds 2-1/2 in to height of unit) ( Hatco - HDW-CASTER-2 ) - The Hatco HDW-CASTER-2 swivel casters fit on Hatco HDW-1, HDW-2, and HDW-3 drawer warming units. They measure 2 inches in...