Features Universal Standard Size Stem: Transform any task chairs or stools into modern, striking furniture with these casters designed with a universal standard size stem. PU Construction: Each caster is constructed with PU, capable of withstanding a load up to 50kg, ensuring durability and reliability. Smooth and Easy Movement: These casters provide smooth and easy movement, making it effortless to move and roll your office chair or furniture. Convenient Replacement: A good replacement for your chair or other furniture, these wheels make your life easier by providing convenience and practicality. Tool- Installation: These wheels can easily be installed without tools or hardware, making the installation process a breeze. Features: 1、These casters are designed with the universal standard size stem, so you can transform any task chairs or stools that roll into modern, striking furniture. 2、Each caster is constructed of PU which withstand a load up to 50kg. 3、The caster is very smooth, easy to move and roll. 4、A good replacement for your chair or other furniture which can make your life easier. 5、Convenient to use, wheels can easily be installed without tools or hardware. Specification: Features: These casters are designed with the universal standard size stem, so you can transform any task chairs or stools that roll into modern, striking furniture. Each caster is constructed of PU which withstand a load up to 50kg. The caster is very smooth, easy to move and roll. A good replacement for your chair or other furniture which can make your life easier. Convenient to use, wheels can easily be installed without tools or hardware. Specification: Material: PU Weight: Approx.535g~1360g / 18.9oz~48oz Diameter: Approx.75mm/ 3in Mounting Height: Approx. 90mm/ 3.54inch Load Capacity: Approx.50Kg Quantity: 5Pcs Type: #1,electrocoating with circlip/ #2,electrocoating with screw rod/ #3,galvanizing with circlip/ #4,PU single wheel (Optional) Size:(#1,#3) Approx. 11 x 22mm/0.43 x 0.87inch (#2) Approx. 8 x 17mm/0.31 x 0.67inch Package List: 5 x Casters Note: 1. Please allow slight measuring deviation due to manual measurement. 2. Please confirm that your requirements are consistent with our product size description before ordering. Package List