RIGID, STANDARD PLATE CASTER, LOAD RATING 900 LB, SWIVEL LOCK TYPE NO LOCK INCLUDED, WHEEL DIA. 8 IN, WHEEL WIDTH 2 IN, WHEEL/TREAD MATERIAL POLYOLEFIN, WHEEL CORE MATERIAL PLASTIC, NON-MARKING YES, NUMBER OF WHEELS 1, CASTER BRAKE TYPE NO BRAKE INCLUDED, TREAD SHAPE STANDARD