【Durable Material】: The pulley is made of high-strength steel, high-quality material to prevent rust and wear. Sturdy and stable construction, large load capacity and flexible swivel. Labor-saving ball bearing: Ball bearings are installed in the pulley, so the pulley rotates easily and saves more force. Compared with other pulleys, the pulley support plate is thicker, the wheels are stronger, and the load capacity is stronger. 【Size】: The total length of the pulley is 13.5 cm, the width is 6 cm, the wheel diameter is 5 cm, and the distance between the two plates is 1.2 cm. Maximum 0.4T: The pulley is made of high-strength steel and has a maximum load capacity of 0.4T. Wide range of applications: Heavy duty casters can be used indoors and outdoors, from fitness equipment, climbing or boating to industry, projects, clothesline and garden umbrella for home. Suitable for factories, mines, agriculture, farming, power construction, loading docks