Descriptions: 3-inch diameter twin bearings with soft roll rubber wheel surface, no marking on carpets or any kind of natural and engineered wood floor, tile floor and all other floors. Features: The wheel is made of high-quality PU material, it has good properties of high strength, stable performance and fine workmanship, eco-friendly, safe and durable. With smooth surface, wear-resistant, and it won't scratch floors in your home or office. Easy to install with the mounting circlip and holes, no need any special tools or mounting experience. 3inch wheel, it has a load bearing up to 50kg, sturdy and strong. Rotating flexibly and quietly, can be perfectly used for office chairs, trolley, electronic logistics facilities, home chairs, sofa and other furniture. Specifications: Material: PU + Steel Color: Black Wheel Diameter: Approx. 76mm / 3inch Mounting Height: Approx. 90mm / 3.54inch Stem Diameter: 11mm / 0.43inch Stem Height: 22mm / 0.87inch Total Length: 115mm / 4.5inch Max Load of Each Wheel: 50kg Quantity: 5Pcs Weight: Approx. 1337g Package Included: 5 x Swivel Casters Note: 1. Please allow small error due to manual measurement. Thanks for your understanding. 2. Only swivel casters, no other stuff included. 1、The wheel is made of high-quality PU material, it has good properties of high strength, stable performance and fine workmanship, eco-friendly, safe and durable 2、With smooth surface, wear-resistant, and it won't scratch floors in your home or office 3、Easy to install with the mounting circlip and holes, no need any special tools or mounting experience 4、3inch wheel, it has a load bearing up to 50kg, sturdy and strong 5、Rotating flexibly and quietly, can be perfectly used for office chairs, trolley, electronic logistics facilities, home chairs, sofa and other furniture