Your child's our concern. That's why our heavy duty training wheels with special attention to stability, the wheel design is thicker than the ordinary training wheel and added a small bracket that it's more stable, for your peace of mind. Features - Color: White -Material:Steel and plastic - Size (wheel): 10.50X10.50X3.00cm/4.13X4.13X1.18in - Size (bracket): 20.00X12.00X10.00cm/7.86X4.72X3.93in -Increase the span of the bracket to prevent the bike from rolling over, just to protect the children -The training wheels for kids bike have the function of slips-proof and noise-free for a safer, easier ride. -So that your child can and smoother when riding, without any worry or -Our bike training wheels can be installed onto your child’s bike quickly and -It can be adjusted at any time according to the skills and levels of the children. Training wheels can be adjusted at any time according to the skill and level of the trainee. Package list: 1 x Pair of Training Wheels