1. new model children bicycle, one wheel 2.Steel rim or aluminum alloy rim 3.Size: 16", 18", 20", 24" 4.Color; Red ... , blue..... New model children bicycle, 16",18",20",24" unicycleModel No.: U-16A (16 ... : 1) Size: 16" wheel2) Materials: Aluminum or stell rim, chromed frame (made from steel tube) 3) Fork: Clamp type, electro-plated ...