... .Load capacity: 200kg--320kg per caster 3.Caster material: Phenolic wheel with Steel roller bearing.Solid steel welded construction,zinc plated ... Americans, our turnover of 2011 is USD27,000,000. Our wheel diameter is from 15mm to 300mm, materials include rubber, TPR ... about us!3.Similar Product:4.Factory: 30 Phenolic caster wheel heavy duty