Netafim 17616-000016 TLDL6-18025 Techline® DL 18" Emitter Spacing .6 GPH Dripline with 250' Coil - This dripline provides maximum uniformity for both subsurface and on-surface installations. The pressure compensating emitters are ideal for sloping terrains and the anti-siphon feature prevents ingestion of debris into the tubing. The flexible UV resistant tubing adapts to any planting area shape and the tubing curves at a 7″ radius. On-surface installation withstands heat and direct sun.