Buy with Confidence: With Monoprice's Lifetime Warranty on all Cables, you can rest assured we stand behind our products and our customers. It is made of 24AWG solid, pure bare copper conductors Monoprice Ethernet cables are made of 100% pure bare copper wire, as opposed to copper clad aluminum (CCA) wire, & are therefore fully compliant with UL Code 444 & National Electrical Code TIA-568-C.2 fire and safety standards CMP (Plenum) fire safety rating 550MHz bandwidth