➤The STEEL wheel allows this wheels to make it easier to move heavy industrial equipment with ease as its high load capacity rolls smoothly in the toughest environment or surfaces. ➤Our Steel casters has a load capacity of a 1200 LBS ➤The Top Plate Overall Size is: 4" x 4-1/2" | Bolt Hole Spacing: 2-5/8" x 3-5/8" slotted to 3" x 3" | Attaching Bolt Size: 3/8" ➤ ROLLER BEARINGS: This caster comes with roller bearings with spanner bushing for greater shock resistance, and increased capacity. Roller bearings allow a caster to perform better during impact loading and shock. ➤3 Year Company Backed Warranty for all ICONCASTERWHEELS Product. We stand behind our products. We offer a 3-year warranty for all of our products. To view, all our products follow ICONCASTERWHEELS.