Features:_x000D_ _x000D_ 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. _x000D_ Each caster is constructed of high quality PU which withstand a load up to 50kg. _x000D_ The caster is very smooth, easy to move and roll. _x000D_ A good replacement for your chair or other furniture which can make your life easier. _x000D_ Convenient to use, wheels can easily be installed without tools or hardware. _x000D_ Specification:_x000D_ Material: PU_x000D_ Weight: Approx.535g~1360g / 18.9oz~48oz_x000D_ Diameter: Approx.75mm/ 3in_x000D_ Mounting Height: Approx. 90mm/ 3.54inch_x000D_ Load Capacity: Approx.50Kg_x000D_ Quantity: 5Pcs _x000D_ Type: #1,electrocoating with circlip/ #2,electrocoating with screw rod/ #3,galvanizing with circlip/ #4,PU single wheel (Optional)_x000D_ Size:(#1,#3) Approx. 11 x 22mm/0.43 x 0.87inch_x000D_ (#2) Approx. 8 x 17mm/0.31 x 0.67inch_x000D_ _x000D_ Package List:_x000D_ 5 x Casters_x000D_ _x000D_ Note:_x000D_ 1. Please allow slight measuring deviation due to manual measurement._x000D_ _x000D_ 2. Please confirm that your requirements are consistent with our product size description before ordering.