The Self Piercing Emitters with a barb makes it easy to install, no tools required. Optional insertion tool is available #747542. These emitters have a 1.74 psi internal check valve that helps prevent low emitter drainage holding back up to a 3.9 ft column of water. Prevents contaminants from being drawn into the emitter. The Self Piercing Emitters are pressure compensating and delivers the same flow from 10.15 t 58 psi. Exclusive TurboNet® flow path design regulates flow and provides continuous self-cleaning action during operation. — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Specifications for Hydro Flow / Netafim Self Piercing Pressure Compensating Emitters w/ 1.74 Internal Check Valve 2.0 GPH Barb Inlet 160 in Red (25/Cs) 747534: | | EACH Packaged | CASE | PALLET | UPC: | 849969012958 | | | Volume: | 0.0028 | | | Dimensional Weight: | 0.0249 | | | Weight (lbs): | 0.05 | 0.1 | | Approx Length (inches): | 4.4 | | | Approx Width (inches): | 2.2 | | | Approx Height (inches): | 0.5 | | | |