Description Great for car amps and battery terminals. Use these to clean up the look in engine bay and amp connections. Works perfect with amplifiers that take a direct wire input. Keeps from having stray strands hanging out and makes adapter use a lot easier. It will also save your wire from getting chewed up from set screw. These kit took the cleanliness of installs to the next level. Won't ever install an amp without ferrules again. Features - Color: Assorted color. - Material: Copper. - Size: 21.00 x 11.00 x 3.30cm/ 8.25 x 4.32 x 1.30 inch. - All cable housing ferrule pin cord end terminal are made of copper material. - Ferrules designed with insulation flare makes wire insertion easier and eliminates loose strands of wire. - Anti-oxidation, anti-corrosion, prevent wire ends from fraying or breaking. - Wire copper crimp connectors will meet all your demands. Widely used in car amplifiers and household appliances. - Cable housing ferrule wrap your wire like a glove. Took the cleanliness of your installs to the new level. This wire ferrules can help you organize scattered wires and prevent them from fraying or breaking. They can provide you with just the right mechanical strength and electrical contacts. This material also has extremely strong electrical conductivity, which can maximize current. Our copper crimp connectors have enough thickness to that they will not crack or break during crimping. The insulating flaring design makes it extra convenient to insert the wires, and the tubular ferrules allow the terminal perfectly your wires without any trouble due to exposed wires.