David - That's probably E0TZ 9932230-B, which is the kit for the 6 3/4' box, as shown here: Exterior/
Beds, Tailgates, & Components, and then the Box Rails tab. But it is really hard to tell from the badly-damaged label.
So it is like buying a pig in a poke, and I'd personally not be willing to do that for anything like $800. $300 maybe.
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI