Maxxlink VCAK-4V1-4 CCA Complete 4-Channel Amplifier Installation Kit with UNItwist RCA Cable, 1000-Watt 4-Gauge

Product received was 100% described. All contents listed on Amazon site were in the package. I should have reasearched this product and other Amplifier Install Kits more carefully. This product has CCA (copper clad aluminum) wires for the amp power wires and speaker wires. What does this mean? After receiving the product, I realized the wires are of aluminum construction and coated/plated with copper on the outside. Aluminum doesn't conduct electrical current as well as copper and may pose corrosion problems in the future, especially the cable attached to the battery and fuse in the engine compartment and on the speaker wires hooked up to speakers on doors. After reviewing my purchase after receiving it, the product does list (in their defense) it's CCA, I just didn't catch that when I originally ordered.The last time I installed an amplifier/car stereo was probably back in 2003 (first install in 1995) and from what I recall, all wiring was still 100% copper. I guess with the increased price of copper, plus most car stereo/accessory brands have been bought-out by cost conscious conglomerate corporations, this CCA wiring junk is common now and 100% copper wires are marketed as a "premium upgrade".The insulation jacketing feels very cheap on the power wires, speaker cables and RCA's. This is subjective, but I found a box of old car stereo wiring in my garage and the 10+ year old Stinger 100% copper 8ga wire's insulation jacket was still flexible and had a better "quality feel" to it.Also, the 4ga power wire seemed to have a smaller cross section (actual internal wire, not insulation) than what I remember from when I last used 4ga. It appeared marginally larger in cross section than some old 8ga Stinger wire I had. I don't have a caliper to measure the thickness, but if I'd have to guess, looks more like 6ga. Again this is a subjective statement.If I had to do it again, I would buy the power and speaker wire, fuse holder, RCA's and install accessories individually. I prob would have paid same price or $10-20 more and would have had a higher quality install.