This wheelchair U-shaped rail guide block is designed to enhance the functionality and comfort of your wheelchair or chair. Crafted from materials, it ensures smooth and reliable movement along the seat rails. Ideal for those seeking to replace worn-out parts, this accessory provides essential support and stability, making daily activities more manageable and comfortable. Features -Color:Black -Material:Plastic -Size:4.20X2.70X2.00cm/1.65X1.06X0.79in -Application: designed to fit a wide range of wheelchairs and chairs, making installation and replacement quick for users -U shaped design: features a u shaped rail guide for smooth and stable sliding, ensuring a seamless and improved user experience - construction: made from reliable materials, this accessory is built to last, long term reliability and performance -Enhanced comfort: provides additional support and stability, improving overall comfort and safety for wheelchair users -Easy to operate: simple and user friendly design allows for effortless replacement, catering to users of all skill levels Package list: 12 x wheelchair seat rail guide