Top Plate: 4" by 4-1/2". Bolt Pattern: 3" by 3". Quiet, easy rolling wheels: very shock absorbing, non-marking, will reject floor debris, roll over screws, metal or Glass fragments, resin pellets and are non-absorbent - w/ Thread Guards. Quantity: 1 - Set of 4. This item is in the category "Business & Industrial\Material Handling\Casters & Wheels\Caster Accessories & Hardware".The seller is "creativeindustrialsales" and is located in this country: US. This item can be shipped worldwide.