This listing is for one (1) US MILITARY ISSUE CAMELBAK HYDROLINK CONVERSION KIT. THIS KIT ALLOWS YOU TO REPLACE AN EXISTING BITE VALVE WITHOUT A SHUT OFF WITH ONE THAT HAS A SHUT OFF VALVE. IT ALSO WILL ALLOW A QUICK DISCONNECT TO USE THE GAS MASK ,TYPE M, DRINK VALVE. IF YOU HAVE ANOTHER BRAND OF HYDRATION SYSTEM WITH A COMPATIBLE TUBING SIZE, YOU CAN INSTALL THIS ON THOSE SYSTEMS AS WELL. If we have listed it as new then it has never been worn but it might show some dust from storage. If ther are any odors that are present we will make note of it here. We store all of our products in our warehouse and not in a home where there be smoke or pet odors. We have found that most military stuff has some sort of odor from the manufacturing process and we always recomend that you wash even new garments prior to their first use. Please follow all printed laundry instruction attached to the garment if any. PLEASE ASK ALL QUESTIONS PRIOR TO BIDDING OR PURCHASING. THANK YOU