Swivel Function: The swivel casters allow for easy swiveling, making it convenient and comfortable for users.Easy Installation: The swivel casters are easy to install, making the replacement process hassle-free.Universal Fit: The office chair wheels are designed to fit all office chairs with mounting holes.Floor Protection: The special locking screw and ergonomic design ensure floor protection during use.Smooth Operation: The office chair wheels provide smooth operation and easy gliding capabilities.100% new and high qualityType: Office Chair Wheel ReplacementWheel Diameter: Approx. 50 mm (2 inches)Shaft Length: Approx. 22 mm (0.87 inches)Shaft Diameter: Approx. 11 mm (0.43 inches)Installation Height: Approx. 58 mm (2.28 inches)Color: BlackApplication: Universally fits all office chairs with mounting holes.Feature: Easy to install, Floor protective, Special locking screw, Ergonomic design, Smooth operation, Easy to slide and swivel.Package Includes: 5 Pcs Office Chair WheelsNotes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3 cm size error due to manual measurement.