Please read in its entirety. What you see in the group picture is what you are purchasing. I DO NOT have a way to test the communication cables, mics, oxygen mask, mic light and the battery pack to see if they function, so Please, consider them all as broken/non-serviceable/non-functioning display pieces. Again, everything will come to you is, AS IS. I do NOT guarantee anything. HGU-55 is a size Large with a manufacture date of 2007 according to the label placed on the inside of the helmet. Helmet will come with a memory foam liner as pictured in the group lot as well as a ...