Features The bracket shell is made of iron plate with galvanized surface to prevent rust. Wheels are made of white polypropylene for wear resistance, shock absorption and less noise. Swivel casters allow movement in multiple directions, allowing the casters to rotate 360 degrees under load. Each caster has a maximum weight of 10kg, and the total weight is preferably less, such as 30kg for 4 casters, to increase the service life. Swivel casters can be used for various purposes such as tables, chairs, trolleys, luggage, etc. Features: -The bracket shell is made of iron plate with galvanized surface to prevent rust. -Wheels are made of white polypropylene for wear resistance, shock absorption and less noise. -Swivel casters allow movement in multiple directions, allowing the casters to rotate 360 degrees under load. -Each caster has a maximum weight of 10kg, and the total weight is preferably less, such as 30kg for 4 casters, to increase the service life. -Swivel casters can be used for various purposes such as tables, chairs, trolleys, luggage, etc. Specifications: Material: Polypropylene, zinc-plated iron Type: Swivel Wheel Diameter: 25mm / 1" Mounting Height: 35mm / 1.37" Wheel Thickness: 1m / 0.51" Mounting Hole Diameter: 4mm / 0.15" Mounting Hole Pitch: 30 x 24mm / 1.18 x 0.94" Wheel Color: White Max. Load: 10kg each Quantity: 4 Package Includes:4 x Casters Package List