Polyurethane Caster Wheel with Swiveling Top Plate - 5-Inch - 750 lb. Load Capacity - for Use on Hard Surfaces such as Concrete

Polyurethane is superior to standard rubber in its resistance to grease, oil, cutting, chunking, and abrasive wear. These casters can be used on almost any dry factory floor or in garages where chemicals may be present. The principle benefit of a polyurethane caster over other casters is increased weight capacity. The top mounting plate for this caster is 4.50 by 3.97. The bolt pattern, which is the distance between each installed bolt, is 3.26 by 2.77. The diameter of each bolt hole is 0.4315. When this caster is installed, it adds an additional 6.41 of overall height to the item you are attaching it to.