DIG Corporation PC Drip Line 100' Brown, 12" spacing, 1/2" (17 mm) .95 GPH (.570 ID x .670 OD) Use 17mm barbs or .700 OD compression fittings Resistant to chemicals and fertilizers commonly used in landscaping Flexible tubing for easy installation Flow regulated, self flushing inline emitters deliver equal flow at a wide range of operating pressures