The "W" Series Hydraulic Crimp Fittings is designed for use on 2-wire and 4-wire Hoses.
The crimp specs, however, are DIFFERENT.
The "W" Series Fitting was designed for Adjustable Crimpers only. If you use a positive stop crimper such as a Parker Parkrimp2 or Weatherhead T-420 crimper - the "W" Series is not recommended for these crimpers.
While some people claim to crimp "W" Series fittings with these crimpers - all "W" series manufacturers stipulate different crimp specifications on most sizes. See the Crimp Chart Comparison Below