... :carbon steel,chrome,stainless steel,iron,copper,ect.2.Roller Material:POM,nylon,glass fiber,etc3.Sealing from:2RS ZZ ,Z ,RS ... ,OPEN (metal or nylon)4.Colour: natural color, green, orange, blue, grey, milky white ... Product:1.OEM and non-standard bearing&roller orders are available .2.Provide high quality bearing and roller according to customers's requirement.3 ...