Features11. It fits children's bicycles sized 12-20" so that you can move them from bike to bike as your kids grow. 22. It ensures your kids' safety and prevents accidental injuries when learning to ride. 33. Providing more confidence for your kid to learn to ride bikes while they know they are safe, which enhance their learning efficiency. 44. Fittings are supplied for easy installment. 55. Strong metal supports to give extra stability and security.SpecificationDescription: This practical training wheels is suitable for bicycles from 12-20 inch, which aims toprovide the necessary security and stability for your kids. Safer kids feel, more confidentthey'd like to ride bicycle and even quicker they learn.Features: 1. It fits children's bicycles sized 12-20" so that you can move them from bike to bike asyour kids grow. 2. It ensures your kids' safety and prevents accidental injuries when learning to ride. 3. Providing more confidence for your kid to learn to ride bikes while they know they are safe, which enhance their learning efficiency. 4. Fittings are supplied for easy installment. 5. Strong metal supports to give extra stability and security.Specification: Material: Plastic+Iron Color: black Suit For: 12-20inch Bikes Weight: Approx. 720gPacking List: 1 x 2Pcs/Pair Training Wheels(With Fittings)Package List