This EH series is interchangeable with PARKER 4000 SERIES, DIXON AG SERIES, EATON AEROQUIP FD42 SERIES, FASTER NS SERIES, DNP PDS1 SERIES, STUCCHI IR SERIES, SAFEWAY S20 SERIES, and SNAP-TITE 60 SERIES. Steel Product. ISO-5675 compliant. General-purpose ball valve couplings with quick-disconnect functionality. ISO-7241-A compliant (1/2'' Body Size Only). The rest body sizes are interchangeable with the PARKER 4000 series and Faster NS series. Note that the FASTER NS SERIES 3/4'' size is different from the PARKER 4000 Series 3/4'' size.