Rugged Construction: Unibody flame-retardant PC housing made for more safety and lasting use; Pure copper with silver plating terminal lug allow high current carrying; Inner locking spring tab is made of Mn-steel for rust resistance, avoiding poor contact over time Polarized Locking Plug: Outdoor electrical cable plug adopts an asymmetrical snap design with polarity marks, allowing insertion only in the correct direction to prevent short circuits or equipment damage caused by incorrect connection Dust-Proof Rubber Cover: Jumper 4 AWG cable connector includes soft rubber shell which adds extra protection for connection port against dust or rainwater seeping when Screwless Quick Connect: SB connector 175A is designed with one-click snap-fit installation, no screw tools required; Insert wire into the copper terminal; Crimp tightly; Insert cables into power connector box untill they lock together with a click sound Wide Electrical Application: Red SB175 cable connector can withstand extreme environment (-13°F- 221.0°F) which are mainly used in various electrical wire connection, suitable for distribution box, car, RV, winch, forklift, motors, yacht, caravan, and ship power system, etc Color: Red Material: plastic Package Contents: 2*Battery Quick Connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.