High-Quality Material: The 4pcs 0 gauge coupler cable connectors are made of nickel-plated brass, ensuring excellent conductivity and durability. Much more solid than standard crimp butt connectors Dual Wall Advanced insulation: Features dual wall heat shrink tubing with heat-activated adhesive, providing a waterproof seal that protects wire ends from environmental elements Wide Applications: Ideal for amplifier grounds, audio amps in trucks, campers, marine boats, trolling motors, cars, and solar installations The screws holds wire securely in place, no crimping required, Hex screw clamping. Quick and easy installation. Perfect for extending or joining cut wires Package Included: 4PCS 0 guage wire splice connectors, 8 PCS extra screws, 1PCS hexagonal wrench, 2 PCS Red heat shrink tubing, 2PCS Black heat shrink tubing<br><br>Material: Polyethylene colour: As shown<br><br>Package Contents: 1 set x 1/0 battery cable<br><br>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.