1.parameter of Coating roll is following: Type Coating thickness Hardness rangement ShA(p&j) Max length Max dia. Dynamic balance grade Coating roll 20-25 60-80(100-50) 8000mm 1500mm It depends 2.advantages of coating roll: working life:long, resistance to wear : good, resistance to acid : strong, surface: smooth. We can supply all kinds of coating rolls according to your requirments.Thanks for your interests to us.