MarineLand Eclipse Intake Tube Extension 1" w/coupler, Fits PFE2, PFE3, 330B (PA1240) Extension tube with coupler Designed for the Penguin 300 series and Eclipse 2 and 3 filter systems Measures 6-3/4-inch length by 1/2-inch diameter Extension tube measures 1-inch length Measures 1/2-inch size