Nylon insulation material is molded onto brazed seam barrel and is resistant to deformation. Funnel entry is formed into inside of insulation to allow for easier wire insulation. Bullet terminal connector has a brazed seam will not separated under pressure or operating stress. Clear nylon allows for easy inspection of wire connection. Industry standard color-coding indicates wire range. Rated to 600 volts maximum, building wire; 1000 volts maximum, 105 degrees C.