These swivel casters with brakes are designed to provide smooth and effortless mobility for various furniture pieces. Made from plastic, they are for cribs, bedside tables, and small carts. The built-in brake ensures stability and safety, making them ideal for both environments. Features -Color:Black -Material:Plastic -Size:7.00X5.50X4.30cm/2.75X2.16X1.69in -Brake design: the builtin brake design allows you to easily secure the crib wheels -Swivel function: the swivel caster wheels enable effortless movement of the bedside trolley, making it easy to reposition as needed - material: made from plastic, these caster wheels are and resistant to damage, providing use -Versatile use: suitable for cribs, stroller, and other applications, these caster wheels offer great practicality for various needs -Easy installation: simple to install and replace, these caster wheels are for home use, ensuring convenience and ease of use Package list: 4 x Caster Wheel 1 x Wrench