3" Cast-iron

Cast-iron wheels have exceptionally long wear life; can withstand temperature extremes. Recommand for infrequently moved objects on rough wood and concrete floors. General-duty swivel casters.No. 9174: 2" (50mm), load capacity: 125 lb.No. 9176: 2-1/2" (64mm), load capacity: 175 lb.No. 9780: 3" (75mm), load capacity: 250 lb.