Rain Bird XFS 09 18 500 Dripline 0.9 GPH 18" Spacing 500' CoilSubsurface Dripline Outside Diameter 0. 634 Inch Inside Diameter 0. 536 Inch Wall Thickness 0. 049 Inch Length 500 Foot Coil Material Polyethylene Pressure Rating 8. 5 to 60 PSI Temperature Rating 100 Deg F (Water), 125 Deg F (Ambient) Color Copper Application Sub Surface Drip Irrigation, Small, Narrow and Tight Planting Area Applicable Standard LEED Nominal Size 1 2 Inch Flow Rate 0. 9 GPH Emitter Spacing 18 Inch With Copper Shield Technology