Danner 20355 2550 GPH Pond Skimmer Pump 11.5-Foot Shut Off High Efficiency Vortex Impeller Unique Upright Design, Specifically for Pond Skimmer Use Silent and Efficient High efficiency Vortex impeller Unique upright design, specifically for pond skimmer use Rigid pre-filter stabilized pump while protecting it from large debris 1-1/2-inch male outlet and 1-1/2-inch elbow included Pump bag included for extra pump protection