http://www.alibaba.com/rss/product_search/Four wheel scooter.rss Marketplace of export & import, offers company directory, catalog, trade leads to importer, exporter, manufacturer, wholesaler. en-us alibaba http://www.alibaba.com/product-gs/276525962/kick_scooter.html The four wheels scooter material is iron ,the wheel is PVC with light,the wheel frame can quakeproof.