THE INDUSTRY STANDARD TWIST-ON CONNECTOR WITH TOP QUALITY PERFORMANCE AND DURABILITY. COLOR-CODED FOR EASY SIZE SELECTION. TIGHT SQUARE-WIRE SPRING MAKES QUICK SECURE CONNECTIONS FOR POSITIVE CONTINUITY. TOUGH SHELL SHIELDS AGAINST ENVIRONMENTAL EXTREMES. RESISTS CHEMICAL ACTION FROM HYDROCARBONS DILUTED ACID OR ALKALINE SOLUTIONS. FLAME-RETARDANT PROPERTIES RESIST HEAT DISTORTION UP TO 105 degreesC (221 degreesF). HIGH-DIELECTRIC SHELL FEATURES DEEP SKIRT DESIGN TO PREVENT EXPOSURE OF BARE WIRE. COPPER-TO-COPPER CONNECTIONS ONLY.