The axle extension stabilizer provides extra support and balance, ensuring that children can ride safely and comfortably. They are also made from good materials, ensuring that they are durable and . Installing the axle extender stabilizer is , making them a for parents who want to help their children learn to ride a bike. Features -Color:Black -Material:Iron -Size:13.50X4.00X3.10cm/5.31X1.57X1.22in -Note:Suitable for size of 12/14/16/18/20inch wheels. - Allowing you to training wheel to your bike with this bike axle extender. - Heavy duty, sturdy and durable, this bike training wheel bolt can be used for a longtime. - Can be used to solve the problem of not being able to install training wheels on bikes with short rear axles. - Chic in look, simple and practical in use, give you a pleasant using experience. - The excellent workmanship of our product will bring you a satisfying using experience and bring you happier mood. Package list: 3 x Pairs of Children Bike Axle Extenders