Netafim 14693-000005 TLHCVXR5-1810 Techline® Copper 18" Emitter Spacing .53 GPH Dripline with 1000' Coil - Techline® Copper defends against root intrusion. Cupron® copper oxide-based technology is infused directly into both the emitter and stripe of the dripline through a patent-pending process for maximum performance. The integration of copper oxide in the external stripe and internal emitter and the unique patented emitter design with physical root barrier and large filtration bath area provides three levels of protection, giving your system the best defense against root intrusion.