Fusion ProConnect Retrofit KitsFusion PC Conversion Kits Transform your Fusion Air Purge gun into a Fusion PC with the ProConnect Retrofit Kit, allowing you to take full advantage of what the Fusion PC delivers: A perfect rebuild in seconds. The Retrofit Kit is compatible with all Fusion AP guns and is available in multiple mix chamber sizes. Acquire all the advantages of the revolutionary Fusion ProConnect while leveraging your existing Fusion AP handle and fluid manifold.