Description: 1. Features: To keep children safe, the wheels are equipped with 3 colorful LED lights, which can make the process of learning to ride a bicycle safe, fun and enjoyable. Installation is quick and easy, and only takes a few minutes. 2. Function: Non-slip, wear-resistant, provide stability, help children ride bicycles. Let the children enjoy the fun of riding a bicycle. Make sure your child is safe when learning to ride. The best start for your child to gain balance and confidence on two wheels. 3. Material: The wheel is made of PVC, and the 5-spoke rim on the steel bearing can reduce noise, reduce vibration, improve traction, and has abrasion resistance, which will be safer and more stable for beginners. 4. General: The size of the auxiliary wheels is adjustable, suitable for 12-20 inch children's single-speed bicycles. 5. Easy to install: Includes everything you need to install. Easy to install and can be adjusted individually. Specification: Product Name: Bicycle Training Wheel Color: Red, green, blue, black, pink Material: PVC+steel Wheel diameter: About 120mm/ 4.72 inches Type: 12-20 inch universal The package includes: 1 pair * Bicycle training wheel 2 pieces * Screws 2 pieces * Nut 2 pieces * Gasket 2 pieces * Positioning piece 2 pieces * Bracket