Matched flow rate nozzles assures uniform coverage. 4" pop-up clearance and overall length of 6". Adjustable distance of throw for spacing of 6' to 15'. Stem cleaner keeps grit out and heavy-duty stainless steel spring for positive pop-down. Easy to remove filter screen that is just beneath the nozzle. Reliable at low-pressure operation. Durable high-impactpoly construction. 1/2" Female connection at bottom. Disassembles without tools.