This Bleed Kit from Rockshox will fit every different Reverb dropper post ever made.
It include 2 x syringes, 120ml of Reverb Fluid and a tool for undoing the bleed screws.
If you need additional Reverb Fluid - you can find it here.
Please note - you cannot use a dot fluid brake bleed kit to perform this job! Reverb Fluid and DOT fluid are NOT compatible at all!