High-quality material: Our bike training wheels are made from high-quality alloy steel and rubber with sturdy metal brackets, which are non-slip and wear-resistant. Improve your child's safety and confidence without worrying about the back of the saddle. Cushioned and sturdy: The training wheels are built with a structural reinforcement design, making them robust for a longer product lifespan. This set of heavy-duty rear stabilizers helps young learners ride bikes until they develop a usable sense of balance on the bike. It improves your child's safety and confidence. Lightweight, quiet, intermittent wheels protect the child from noise. Adjustable size: The training wheels are suitable for bikes ranging from 12 to 20 inches and can be adjusted based on the child's abilities and skill level in cycling. The training wheels are individually strong and adjustable, providing the necessary safety and stability for cycling. Easy to assemble: The stand is made using a multi-layer back lacquer process, and the surface is smooth and burr-free, so you won't injure your hands during assembly. All mounting parts and installation instructions are included, and you have more options to adjust the height. The training wheels can be used for a longer period and are perfect for children on bikes. Hassle-free shopping: We strive to offer the best customer service to ensure you have a happy shopping experience. If you have any questions about the product you received, feel free to contact our customer service. We will respond within 24 hours to provide you with a comprehensive after-sales experience. Package includes: 2* Bike balance wheels 2* Upright bike stands 2* Spacers 2* Screws 2* Nuts 2* Washers 1* Wrench