General description These 50mm Office Chair Roller Castor Wheels are designed for universal compatibility, featuring a stylish black and white color scheme. This set includes 15 durable plastic casters, perfect for replacing old or worn-out wheels on office chairs. Technical specifications Diameter: 50mm Material: Plastic Package Contents: 15 Universal casters Measurement allowed error: +/- 1-3cm Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.