This is a 3/4 " MPT pex al pex compression fittng once known as Kitec fittings. Kitec pex al pex compression fittings is just a name brand and this is not an actual Kitec pex al pex compression fitting but it is our own brand of pex al pex compression fitting. This pex al pex compression fitting will work with 3/4" MPTpex al pex pipe or any Kitec pex pipe. This is a fitting replacement for Kitec compression fitting or any other brand of pex al pex compression fittings.