1、It fits children's bicycles sized 12-20 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. Description: This practical training wheels is suitable for bicycles from 12-20inch, which aims to provide the necessary security and stability for your kids. Safer kids feel, more confident they'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 as your 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: Green Suit For: 12-20inch Bikes Weight: Approx. 720g Packing List: 1 x 2Pcs/Pair Training Wheels(With Fittings) Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.