Rain Bird Plastic Drip Irrigation Emitter Tubing 1/2 in. x 50 ft. L (Pack of 8)Rain Birds copper colored subsurface emitter tubing with copper shield provides 90% watering efficiency, right at the root zone. Rain Birds patent pending copper shield technology protects the emitter from root intrusion, creating a long lasting, low maintenance sub surface drip irrigation system for use in organic gardens or shrub and groundcover areas. Having the copper color outside ensures the copper chip is inside and that your dripline is