Features: Brand new and high quality Made of Plastic and PET material, it is solid, durable, wear resistant, quiet, won'for t hurt the floor. It can swivel 360-degree pivoting action on smooth design, convenient to use. Great replacement for your old or broken wheels, save money. You need to have strong ability in DIY. Convenient installation and wear-resistant. Rotating flexible, you can use them for long use. Specifications: Material: Plastic and PET Optional Color: Black,Light gray Optional Size:app. Small, Large,as picture shown Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-2cm error due to manual measurement. make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2pcs Swivel Wheels 1set Mounting Screws Made of Plastic and PET material, it is solid, durable, wear resistant, quiet, won'for t hurt the floor. It can swivel 360-degree pivoting action on smooth design, convenient to use. Great replacement for your old or broken wheels, save money. You need to have strong ability in DIY. Convenient installation and wear-resistant.