Feature: 1. 【Perfect Match】 ： Package Contains 2* Flashing Wheel, 2* Screw, 2* Washer, 2* Lock Nut, 2* Screw Cap, 2* Gasket, 1* Wrench. You can choose other height adjustment options so that the training bike can be set up quickly and easily Install it on your bike. 2. 【Flash and Balance】 ：LED flash wheel, cool bicycle auxiliary wheel. The small bracket of the exercise bike is more stable and can help young students ride the bike until they feel the balance of the bike, so you don't have to worry about your child's safety. 3. 【High Quality Material】 ： Our auxiliary bicycle wheels are made of high quality metal, plastic and rubber. They are non-slip and quiet, so that your child can be safer and more stable while riding without any worries or worries. 4. 【 How to Choose】 ： This luminous bicycle auxiliary wheel is a universal type, suitable for children's bicycles with tire sizes of 12/14 /16 /18 /20 inches. 5. 【Widely Used】 ： Childhood children's best friends - keep your child balanced and confident without having to wear a saddle. It brings more entertainment to your kids. Specification: Material: metal, plastic Color: black/blue/green/red Suitable tire size: universal for 12/ 14 /16 /18 /20 inch Features: flashing wheels, general bicycle auxiliary wheels Package List: 2* Flashing Wheel 2* Screw 2* Washer 2* Lock Nut 2* Screw Cap 2* Gasket 1* Wrench Note: Due to the different monitor and light effect,the actual color maybe a slight different from the picture color. Please allow 1-2cm differs due to manual measurement.