ITEM NAME:Bike Training Wheels Metal Anti-Slip Biking Learning SafetyStabilizer Wheel Description: Reinforced steel training wheels with premium tires provide great security and stability Very easy to install and sturdy enough to run smoothly and prevent from dangers This training wheels provides kids to gaining their balance and confidence without needing adults holding Fits for 16 18 20 22 24 inches bicycles Wheels Comes with a free ring bell which can be used for bikes, tricycle, kids scooters, skateboard and etc. Specification: Material: Steel, Plastic Diameter: 10cm/3.9inch The Bell suitable for Handlebar Dia.: 21mm - 23mm/0.83-0.91inch (Approx.) Package Includes: 1 Pair Training Wheels with Mount Bracket Screws 1 Piece Ring Bell DMO0008665719526871.Reinforced steel training wheels with premium tires provide great security and stability. 1 Pair Training Wheels with Mount Bracket Screws. 1 Piece Ring Bell. Material: Steel, Plastic.