1.Top quality for inner brass and brightness 2.Material:BMC,DMC 3.Screw thread:6 to 10 mm 4.fire resistance 5.CE Certificate 1.Made of bulk molding compound,unsaturated polymer with fiber glass (BMC/DMC material).2.Good electrical resistance,heat resistance,fire resistance,low shrinkage and water resistance properties for these plastic insulators.Main technical parameters ModelSM-25SM-30SM-35SM- ...