Drip Irrigation Line 1/4" Tubing 100' ROLL, 6" Emitter Spacing, .52 GPH, color black (.170 ID x 240 OD) - Will Work From Gravity Feed Use 1/4" barb 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