Condition: Brand _x000D_ Item Type: Children Bike Training Wheel_x000D_ Material: metal + rubber_x000D_ Color: blue, pink (optional)_x000D_ Suitable for: 12 "/ 14" / 16 "/ 18" / 20 " children bicycle_x000D_ Diameter: approx. 11.5cm/4.5inch_x000D_ Thickness: approx. 1.5cm/0.6inch 1More durable, using high quality environmental protection high strength PP plastic. 2Our products have done static treatment, no scrubbing, maintain the bright and beautiful for a long time. 3These heavy rear wheels provide the necessary safety and stability needed for the first road test of a bicycle, giving your child the best start for balance and confidence without holding the saddle. 4This heavy-duty rear wheel stabilizer helps young students ride their bikes until they have a usable sense of balance. 5Suitable type: suitable for most 12inch to 20 inch single?speed bikes. With horizontal rear track fork ends, but not for half?horizontal or vertical drop bikes.2 x Training Wheel2 x Support Bracket1 x Screws Bag