EXTENSION INSULATORS are one piece units manufactured by coupling silicone covered core rod to polymer deadend insulators. Extension Insulators are made using the same manufacturing methods and quality assurance program as deadend insulators. Each Extension Insulator is mechanically proof tested to a minimum of 45kN (10,000 lbs). EXTENSION LINK INSULATORS consist of a silicone covered core rod with a variety of end fittings. Each Extension Link Insulator is mechanically proof tested to a minimum of 45kN (10,000 lbs). These can be coupled with an insulator for application requiring extensions or extra clearance.