qingdao sunworld industrial co., ltd. established in 2005, is a producing enterprise which mainly manufactures rubber,metal and plastic products.mainly produces 5 various 70 kinds of products,such as tyres & tubes & rubber & tool carts,all products sell well in 30 countries and regions,they are warmly welcome by the customers at home and abroad our company mainly produce many kinds of tyres,tubes,rubber wheels,casters and other rubber products,and the size is from 5” to 18”, such as 5x2”,8x2.50-4,10x3.50-4,13x4.00-6 16x4.00-8 16x6.50-8 18x6.50-8 etc. hope to do some business with you