... quality standard: ISO 9001:2008 2.Company:Flywheel Caster Manufacturing Ltd., established in 1981, which is ... -resistance.Now it already has become a professional caster company which integrates design, manufacture, assemble, inspection ... rubber, TPR, PU, plastic, nylon, cast iron, pneumatic, phenolic and sandwich, etc. Our housings have special ... American type thermoplastic rubber or pu caster wheels