This Kirby Morgan neck ring assembly comes with a latex neck dam and is used in the KM-17K, KM-37, and KM-57 helmets.
Options:
505-118 Small/Medium Latex Neck Ring Assembly (For KM-17K, KM-37, KM-57)
505-117 Medium Large Latex Neck Ring Assembly (For KM-17K, KM-37, KM-57)