【PREMIUM PP MATERIAL】 Made of high-quality Polyurethane material, the top plate metal wheels are strong, durable, wear-resistant, and not easily damaged. Galvanized steel plate is corrosion-resistant, not easy to rust, and has good durability and long service life. On the smooth floor, the maximum load (4 casters) is 88lbs total weight, 22 lbs per caster 【ROLL SMOOTHLY】 The white small wheels have low starting and rolling resistance, they can roll smoothly on the floor without leaving any traces. So they will not scratch or damage your floor. 【360 DEGREE ROTATION】 The swivel casters can rotate freely at 360 degrees, so you can easily move the equipment in the direction you want. Swivel casters are time-saving and labor-saving, and can help you greatly improve your work efficiency. 【MULTIFUNCTIONAL APPLICATIONS】 These swivel casters wheels are very suitable for small equipment and small space furniture, such as trolleys, workbenches, cabinets, coffee tables, plant stands, furniture, and small machinery. 【SIZE】Wheel Size: 0.94" x 0.47" (D*H); Holes Diameter: 0.16" Screw Size: 0.15" x 0.63" Top Plate Size: 1.33" x 1.14"; Total Height: 3.5cm / 1.38". Package Content: 4 x Swivel Caster, 16 x Steel Screw.