Alexapure Pro Replacement Parts Kit To ensure your Alexapure Pro water filtration system is always running at its peak, it's a good idea to keep a backup for some of the smaller parts. These parts may go missing in transport during an emergency. Over time, they may need replacing, especially with use in rough terrain or tough weather conditions. Keep a replacement parts kit on hand for that "just in case" scenario. That way you can ensure peak operation of your Alexapure Pro filtration system's ability to bring drinkable water to your family. This Repair and Parts Kit includes: 3 rubber plugs for filter ports 1 non-slip rubber base ring 1 plastic knob for lid (assembly hardware included)