New Edelmann power steering fluid filter.  This is the Elite series inline filter which uses a serviceable mesh filter in a metal housing to keep contaminants from re-entering the pump.  Filter can be removed via push clips and cleaned and re-installed. This includes 3 size cap nipples for numerous applications : 3/8" ID (.375"), 1/2" ID (.500") , 5/8" ID (.625") rubber/EPDM power steering hose, and is designed to be used on the return side (low pressure) only.   Simply splice into the existing line.