Childrens training Wheels are made of high-quality steel which can bear heavy children without security problems. They are sturdy and durable which can keep bycicle beginner stable and help child learn to ride a bike without fear. This is a good choice of fittings for your children to learn the bike at the first time. Improve your childs safety and confidence. Features - Color: Red. - Size: 11 x 11 x 2.5cm. - Material: Rubber. - Childrens training Wheels are made of high-quality steel which can bear heavy children without security problems. - They are sturdy and durable which can keep bycicle beginner stable and help child learn to ride a bike without fear. - This is a good choice of fittings for your children to learn the bike at the first time. - Improve your childs safety and confidence. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.