Netafim 17616-000021 TLDL9-1201 Techline® DL 12" Emitter Spacing .9 GPH Dripline with 100' 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.