Seal kit for Rockshox Monarch air sleeve service
Here's an air can service kit for all years of Rockshox Monarch and Monarch plus shocks. It contains all of the parts you need for an air can service.
The only other thing you need is a quality assembly grease/seal lubricant. We prefer to use Slickoleum instead of the traditionally recommended rockshox dynamic seal grease and 15W50 assembly grease.