4" Casters Set of 4

• Heavy-duty wheels never puncture or go flat
• All purpose rubber tread for grip on many surfaces
• 3” x 3” hole patterns
• 1-320993 and 1-321990: 6 in; load rating: 3600 lb
• 1-320990: 4 in; load rating: 2800 lb
• 1-320990 and 1-320993: Set of 4 casters comes with two fixed and two swivel casters
• 1-321990: Set of 4 fixed casters