This Kirby Morgan neck ring assembly comes with a neoprene neck dam and is used in the KM-17K, KM-37, and KM-57 helmets.
Options:
505-090 Small Neoprene Neck Ring Assembly (For KM-17K, KM-37, KM-57)
505-119 Medium Neoprene Neck Ring Assembly (For KM-17K, KM-37, KM-57)
505-120 Large Neoprene Neck Ring Assembly (For KM-17K, KM-37, KM-57)
505-093 Extra-Large Neoprene Neck Ring Assembly (For KM-17K, KM-37, KM-57)