Ball Casters
Chair Caster Wheels 3 Inch Swivel Rubber Replacement Soft Safe Rollers 5Pcs
Material: Steel and Rubber
Wheel diameter: 50mm (2-7/8") - Approx 3"
Stem Length: About 22mm (7/8 inch)
Stem Diameter: Approx 10mm and 11mm
Color: Black With Transparent