Description Bike training wheel, also the bike stabilizer, which is a good helper for beginners to reduce their fear and gradually learn to keep their bike balance. Made of steel and plastic material, much stable and safe to use. We pay special attention to stability when building heavy training wheels, and the vertical support arm is designed to be thicker to support heavy riders. Features -Color:Black -Material:Steel and plastic -Size (wheel):10.50X10.50X2.50cm/4.13X4.13X0.98in -Size (rack):17.50X9.00X9.00cm/6.88X3.54X3.54in -Made of high strength and sturdy material, durable and safe, practical and wonderful. -Unique designed can give your child the best start with two-wheel balance and confidence. -Perfect bike accessories for those who are not skilled at cycling or afraid of falling. -This is a good choice of fittings for your children to learn the bike at the first time. -Easy installation, you can install this wheel on your children's bike easily and quickly. Package list: 1 x Pair of Training Wheels Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!