RE Secondary Rack comes in three different class and type of application; eighter single,two or three spool type for light,medium and heavy duty class respectively.
lnsulator post struts are rounded to assure it will not damage insulation when stringing secondary. Struts are electricity arc welded and riveted for heavy and medium duty class respectivel.
ANSI class 52-3 and 52-2 insulator will fit the heavy and medium duty rack respectively.