Seal kit for Rockshox Monarch air sleeve service
Here's an air can service kit for Rockshox Monarch and Monarch plus shocks from year 2011 onwards. It contains all of the parts you need for an air can service. These seals have reduced friction on the stock kits, we have been impressed.
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.