Dimensions: roller diameter 75mm, assembly height 110.5mm, wheel radius 115mm, bike width 32mm, thread M16 (16mm) Rolling noise: The wheel surface is made of rubber, crafted with a special process, highly elastic, quiet, and can effectively protect the floor Flexible and safe: Anti-leakage swivel type turntable, prevents leakage, allows 360-degree rotation, enables flexible steering, double brake design ensures the wheel stops completely when braking, providing secure operation Detail design: Wheels with dustproof caps, effectively block dust and prevent debris winding, holder thickness is 2.5 mm, built-in high-quality bearings, strong wear resistance and load capacity, each 4 inch wheel can support up to 250kg Applications: Widely used in homes, offices, hospitals, camps, schools, exhibition stands, small and medium-sized material transport, heavy equipment, automobiles, and factories. Ideal for heavy furniture and equipment Color: As shown Material: Metal Package Contents: 4 x wheels Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to slightly differ from the actual product. Measurement allowance is +/- 1-3cm.