Sizes:4.00-8 Material:PU rubber Rim:plastic,red color or according to ... ,power concrete tools,glass,construction materials producing machinery,wheel barrows,rubber wheels and some spare parts.Specification: NameFlat Free ... durable and significantly easier to roll than ordinary hard rubber tires. Working Life5-8 years,At least 4 to ... feel free to contact us. flat free rubber wheel 4.00-8 for wheelbarrow