These are the best thing since sliced bread, these thread into any 1/8" NPT port in your system and just use your shop air to fill your tank, your bags or what ever you want. These are leak free and should be added to the tanks of every airride installation. Ever have your battery fail and you can't get the air pump to fill your tank so you can air up your suspension? These are convenient, inexpensive, and invaluable valves to have. Buy a few just in case. This will go into your 1/8 NPT port Harley Air shocks to split your tee'd  system and do away with the trouble some remote fill that most have. 1 valve per shock is needed. Comes as pictured. Please take a close look at the pictures to see the condition and to make sure this will work with your application needs.