... Option:1.Bearing Material:carbon steel,chrome,stainless steel,iron,copper,ect.2.Roller Material:POM,nylon,glass fiber,etc3. ... -standard bearing&roller orders are available .2.Provide high quality bearing and roller according to customers's requirement.3.Popular in ... on commitment, focus on quality, the pursuit of high-quality cost-effective. 3, We have advanced equipment and mature techniques.4.We own ...