1A good helper for bicycle practice: The bicycle stabilizer is a good helper for bicycle beginners, which can alleviate their fear and gradually learn to maintain the balance of the bicycle.2Material: Bicycle training wheels are made of high-quality ABS rubber and thickened steel to provide beginners with higher safety and stability.3Easy to install: We provide complete installation tools including 2 wheels, 2 bracket arms, 2 shoulder bolts, 2 lock nuts, 2 stop blocks, and 2 washers.4Applicable models: In addition to HUFFY bicycles and variable speed bicycles, the support wheels are suitable for most 12-20 inch single speed bicycles with horizontal rearward track fork ends.5Important note: These heavy-duty rear training wheels come with mounting parts and instructions that can be adjusted and installed separately. Any questions, please feel free to contact us.1 pair Kids Bicycle Training Wheels