Premium quality: PVC insulation layer outside; the strands inside is tin-plated pure copper and took standard rosin core solder with ease, the wires are thicker than most of the other similar products. Features higher power is supported and stronger physical features. Easy to use: Cut to whatever lengths you need. Use the wire stripper to strip partial external plastic of the extension cable, then access it to your device. Durable & Flexible: The insulation was durable and flexible. The wire inside is stranded so it can take a lot of flexing without breaking. Solder make better: Solder the wire to it can provide you a stable connection when you are trying to connect this LED strip wire with the solderless connectors or strip lights. Application: This extension cable works great with SMD 5050/3528/2835 RGB LED strip lights. It can also be used for two conductor systems because the 4 individual wires are separable.