Specification: • Brand New • Product:Chair Wheels • Material: Steel + Rubber + Plastic • Color: as Pictures • Screw Thread Type • Wheel Diameter: Approx. 50mm (20 inch) • Stem Length: Approx. 14mm (0.55 inch) • Stem Diameter: Approx. 10mm (0.4 inch) • Click-in Type • Wheel Diameter: Approx. 50mm (20 inch) • Stem Length: Approx. 20mm (0.79 inch) • Stem Diameter: Approx. 11mm (0.43 inch) • Embed Type • Wheel Diameter: Approx. 50mm (20 inch) • Screw Thread Type White • Wheel Diameter: Approx. 50mm (20 inch) • Stem Length: Approx. 10mm (0.4 inch) • Stem Diameter: Approx. 10mm (0.4 inch) • Click-in Type White • Wheel Diameter: Approx. 50mm (20 inch) • Stem Length: Approx. 20mm (0.79 inch) • Stem Diameter: Approx. 11mm (0.43 inch) • Styles: Simple/ European / Classical . • Feature: Universally matches all workplace chair with mounting holes. • Easy-installing, Floor-protecting,Special Locking Screw,Ergonomical Design,Smooth Operation,Easy-gliding and Swivel. Package Included: • five x Office Chair Wheels Note: • PLEASE Check Detail Sizes as Photos Shown Below and Make Sure You Understand How to Measure the Size of Your Needs! If you are not yes about the length you need, feel free to contact our customer service. • Please enable minor deviation due to guide measurement. • Due to the difference between different monitors, the image may not reflect the actual coloration of the item.