... ,Φ14,Φ12,Φ10,Φ8.5,Φ8,Φ6.5 Length:200mm5000mmSurface treatment: a variety of plated nickel, passivation, black, spray.Note:Electric ... technical requirements to produce all kinds of electric heating pipe for different materials, models and shapes of the , and promised to ... meet the needs of usersQuality certification : UL TUVquality gurantee Economical Liquid heating pipe for water heater