General description These 50mm Office Chair Caster Wheels are designed for smooth mobility and protection of hard floors. The set includes 15 black caster wheels that swivel 360 degrees, making them ideal for office chairs and other furniture. Technical specifications Wheel Diameter: 50mm (2 inches) Wheel Height: 55mm Stem Length: 22mm Standard Stem Size: 11mm Material: Heavy Duty Plastic Content: 15 Universal Casters Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.