DO YOU KNOW THIS: The 1/2 inch pex a washing machine outlet box is ONLY compatible with expanding fitting system, NOT compatible with crimp pex fitting system. Its inlets work well with 1/2 inch Pex A pipes; the outlets fit well with 3/4 FHT inch washing machine hoses. PACKAGE INCLUDES: Pex A Washing Machine Outlet Box*1; Pre-installed support bracket*2; Expansion Ring*4.