Not affected by grease, oils, most chemicals and cleaning chemicals. Top Plate: 4" by 4-1/2". Bolt Pattern: 3" by 3".Material: Solid cast Polyurethane Elastomer. Quantity: 1 Set of 4. Get Images that Make Supersized Seem Small. Get Auctiva's Listing Templates on your items with a few clicks. Attention Sellers - Get Templates Image Hosting, Scheduling at Auctiva. This item is in the category "Business & Industrial\Material Handling\Casters & Wheels\Casters". The seller is "creativeindustrialsales" and is located in this country: US. This item can be shipped worldwide.