Description This product is a convenient and practical track wheel, made of sturdy and durable nylon material, safe to use and excellent in texture. The reasonable design makes it have a wide range of use, and can be well used in reversing railings, yard gates, rolling shutters, and terrace sliding doors. The product has excellent craftsmanship, good flexibility, easy to slide, and very practical. Features - Color: Light yellow. - Material: Nylon. - Size: 11.00X5.00X5.00cm;/4.32X1.97X1.97in; - Reasonable design makes it easy to install and use, and can serve you well. - It has a wide range of applications and can be used for courtyard gates, rolling shutters, terrace sliding doors, etc. - Efficient and durable heavy-duty track wheels can be well applied to your daily life and bring you convenience. - The product is small and light, easy to store and use, and very convenient. - It is manufactured with professional technology to ensure the of the product and can work for a long time.Package list: 4 x Guiding Wheels