Rain Bird XFSCVPS912500 Sub Surface Dripline with Check Valves, 0.9 GPH 12” Spacing, 500 FT Coil, Purple Stripe Tubing SH 1 Color Gray Warranty Period 1 Year Color Gray Warranty Period 1 Year limited Category Surge Accessories Web Unit Carton Height (in) 1 Unit Carton Length (in) 7 Unit Carton Weight (lb) 0 their smaller design does not limit but maximizes cutting power when making cuts up to 18mm 0 Required Filtration: 120 mesh XFS CV Sub Surface Dripline emitters are protected from root intrusion by Rain Bird’s patent pending Copper Shield™ Technology resulting in a system that does not require maintenance or replacement of chemicals to prevent root intrusion