This EH series is interchangeable with PARKER 60 SERIES, DIXON H SERIES, EATON AEROQUIP FD45 SERIES, FASTER HNV SERIES, DNP PBV1 SERIES, STUCCHI IRB SERIES, HANSEN HK SERIES, SAFEWAY S10 SERIES, VOSWINKEL IB SERIES, and GROMELLE 635-A SERIES. Steel Product. Industrial-grade standard couplings compliant with ISO 7241-1 Series B. Full size range available from 1/8" to 2" with multiple thread options (BSP, NPT, SAE). Designed for reliable performance in demanding industrial environments.