3359 XTD Andersen WD Bracket set 'EXTENDED UNIVERSAL' 3", 4", 5" & 6" (2 inside, 2 outside brackets w hardware) for use with underslung couplers brake This particular plug in harness provides Length:72" This particular plug in harness provides a 4 way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Volvo XC90 (to verify your vehicle compatibility This 5th wheel hitch comes with the CURT R24 roller and a set of 5th wheel rails to be mounted in your truck bed using a 5th wheel bracket kit (brackets sold separately) See the Weight Distribution Fitment Guide (below) to make sure these brackets are right for your set up The EXTENDED UNIVERSAL 3 4 5 6 bracket set fits standard 3"