These are the only in-line emitters available that are pressure compensating. They are exactly the same as the CETA PC emitters above, but are on 4" stakes. The in-line emitters are all 1 GPH and they can be taken apart for easy cleaning. They have 1/4" barbs on the inlet and outlets. Up to 15 of these in-line emitters can be run on a single line of 1/4" tubing. All of these emitters operate in a pressure range of 10 to 50 PSI.