[Sturdy Material]: Bike training wheels for kids are made of high-quality ABS wheels and high-quality metal.<br> Bicycle auxiliary wheels are durable, non-slip and wear-resistant, providing stability, helping children ride bicycles, and making children enjoy the of riding bicycles.[Safe<br> & Auxiliary]: Your children's safety is our top priority.<br> Heavy duty training wheels help beginners to maintain balance and provide greater safety and stability until they learn how to ride a bicycle.<br> Without holding the saddle, you will make your children's safety.[Universal<br> Size]: Our kids bike universal training wheels suit for 12 14 16 18 20 inch children's bicycles, which meets the needs of children to learn to ride when they grow up.<br> Please check whether these wheels are compatible with your bicycle.[Flash<br> Design]: Our toddler training wheels are non-slip and noise-free.<br> Especially with the flash function, children are more interested in riding at night.<br> Bicycle stabilizer wheels are great helpers for your child's first bike class [Easy to Install]: By two wrenches to install the training wheel on the rear wheel of the children's bicycle, and you can adjust the distance of the vertical bracket from the ground.Specifications:Wheels Size: 11 x 2.5 cmVertical Bracket Arms Height: 22 cmAttention:Before riding, please check whether these auxiliary wheels are tightened.colour:<br> blueMaterial: ABS+metalPackage Contents:2 x auxiliary wheels2 x vertical bracket2 x bolts2 x nuts2 x washers2 x gasketOnly the above package content, other products are not included.Note:<br> Light and different displays may cause the color of the item in the picture a little different from the real thing.<br> The measurement allowed error is +/- 1-3cm.