General description The set includes 4 swivel casters with a diameter of 40mm, designed for easy mobility on various surfaces. Made from soft rubber and TPE materials, these wheels are ultra-quiet and provide high elasticity, allowing for 360° flexible movement. They are ideal for DIY furniture projects and can be used on a variety of floor types without causing damage. Technical specifications Material: Soft rubber and TPE Color: Black Wheel diameter: 40mm Thread size: M8 x 15mm Load capacity: 20 kg per caster Usage Suitable for various floor types including ceramic tiles, cement, marble, carpets, and wooden floors. Designed for DIY furniture with mobile casters. Features built-in low-noise bearings for quiet movement. Other information Box contents: 4 x 40 mm swivel casters with M8 x 15 mm threaded stem. Features no brake and one-way rotation. Built-in bearing design for low friction resistance and durability.