Imperial 71841 Non-insulated Butt Connector, 6 Gauge,per Package Of 20 Funnel barrel is molded to the I.D. of the terminal barrel for positive and easy wire insertion without strand hang-ups. Rigid sleeve supports the wire insulation. Temperature Range: Continuous duty from -40&deg; F. to 220&deg; F., Intermittent duty to 300&deg; F. Designed to resist fractures under heavy vibration. .057" stock.