... NT,NC,BC,BP,FC,type 1-1/2"--2" Heavy duty Industrial Caster: 4"-8" Rubber Wheel, 6 Casters, ... BT,NT,NC,BC,BP,FC,type 1-1/2"--2" Heavy ... duty Industrial Caster: 4"-8" Rubber Wheel, 6" 8" ... Loading Heavy Duty Industrial Caster Series AA: Medium-Loading Rubber A Type Industrial Caster Series:4.0mm,4"--8" BB:Medium ...