The casters are made of rubber, they have a good cushioning effect and will not make a squeaky rubbing sound on the floor when in use, enjoy smooth and quiet rolling and stay focused and relaxed with these casters, a squeaky, rickety office chair wheel is a telltale sign that theyre cheap and poorly made.
The outer layer of casters is made of rubber-like plastic material coated with soft polyurethane. This soft shell not only prevents damage to your floor, but also rolls freely on the carpet. Total height is 4.5 inches with wheels measuring 3 inches in diameter and stem 7/16 by 7/8 inches wide; 360 degree swivel; holds up to 650 pounds of weight.