... :carbon steel,chrome,stainless steel,iron,copper,ect.2.Roller Material:POM,nylon,glass fiber,etc3.Sealing from:2RS ... Z ,RS,OPEN (metal or nylon)4.Colour: natural color, green, orange, blue, grey, milky white, porcelain white etcProduct Series: ... bearing steel, stainless steel, non-standard bearing and injection molding roller and dysmorphism parts. Our product with advanced equipment, mature techniques ...