Premium Material: Made of high-quality material, our bike training wheels have the advantages of strong load-bearing, rustproof, durable and corrosion resistance. They can withstand the wear and tear of regular use. High Stability: Triangular bracket design for stronger and more reliable support. Our training wheel helps beginners use bicycles more safely and learn to bike with ease. Simple Installation: The training wheel kit includes baskets and gaskets. With their easy installation process, you can quickly attach these bike training wheels to your child's bike. High-quality Bearing Pulley: Compared with other similar products, our bike training wheel has double-bearing pulley for quiet and durable performance. Wide Compatible: Our universal training wheels are suitable for 12/14/16/18/20-inch children's single speed bicycles. Easy to install and remove. Item Name: Training Wheel Material: Metal Features: High Stability, Wide Compatible, Strong Load-bearing Size Details: Diameter: 12cm/4.72" (Approx.) Notes: 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. Package Includes: 2 x Training Wheels 2 x Bracket 1 x Bell 2 x Gaskets