4 In. drip irrigation micro-spray pop-up. Retracts for clean appearance in gardens and landscaping. Features adjustable rectangular pattern or 2-1/2 Ft. x 5 Ft. or 4 Ft. x 8 Ft. Connects below surface to 1/4 In. tubing. Works at low drip pressure of 20 to 50 psi (pounds per square inch).