Heavy Duty TPR Rubber Caster Wheel with Swiveling Top Plate  - 4-Inch -  300 lb. Load Capacity  -  Non-Marking for Use in Hospitals, Food Service, & Other Institutional Applications Features gray non-marking rubber that is especially suited for Institutional Applications Safe on Carpet, Concrete, Tile, & Wood Surfaces For Use On: Desks, TV Stands, Carts, Bed Frames, Dressers, Chairs, Tables, Stools, Toolboxes & More Top Mounting Plate: 4.48"x3.93" Bolt Pattern: 3.28"x2.76" Bolt Hole: 0.435" Overall Height: 5.61" Includes: (1) Heavy Duty Rubber Caster, Wheel with Attachment Plate