Features:[High-Quality Materials]: Crafted with premium ABS wheels and high-quality steel, this training wheel set ensures safety and stability for beginners. Its lightweight design and noise-free operation provide a smooth and secure learning experience.[Enhanced Safety]: Protect your child during their learning journey with these flash mute wheel. They offer the perfect balance and confidence-building start on two wheels, guaranteeing a s-afe and enjoyable riding experience.[Functional and Durable]: These bicycle stabiliser mounted kit are designed to be slip-resistant, wear-resistant, and provide stability. They assist children in learning to ride a bike, allowing them to fully enjoy the thrill of cycling while ensuring their safety.[Universal Fit]: The adjustable size of the training wheels makes them suitable for 12-20 inch children's single-speed bicycles. They can be easily installed and provide a perfect fit for various bike models.[Easy Installation]: This training wheels set includes everything you need for installation, including 2 shoulder bolts, 2 training wheels, 2 vertical brackets, 2 washers, 2 locking nuts, and 1 limiting spacer. Enjoy a hassle-free setup process and get your child ready to ride in no time.Specification:Dimensions: 6.50in (165.10mm) x 3.54in (90.00mm) x 1.10in (27.94mm)Wheel material: PVC + steelSize: 12-20 inches universalPacking list:2 x wheels2 x vertical bracket for 12-20 inches bike2 x limit spacer2 x bolt2 x nut2 x washer1 x wrench.Stainless Steel