Is this one sleeve or two?
Two. The kit is a pair — one 16mm jam nut support sleeve for each inner tie rod.
What is the sleeve made of?
Steel, CNC machined in-house and finished in silver zinc.
Will it fit under my stock steering setup?
Yes. The sleeve is machined to retain close to factory clearance, so it works within the stock front end envelope.
Does 16mm mean the sleeve is 16mm?
No — 16mm is the thread size on the factory inner tie rod that the sleeve is built around. Ford Raptors use 16mm. The Ranger Raptor and the standard Bronco use 14mm and need a different sleeve.
Will this fix a tie rod that is already bent?
No. A bent inner tie rod needs to be replaced. Install the sleeves on the new one so it does not happen again.
Do I need this if I already run the billet half tie rod kit?
Yes, and arguably more so. The half kit upgrades the outer half but keeps the factory inner shaft, which is where the bending happens. The two are designed to be run together.