Product Description -16 Male Flare to -16 O-Ring Boss Straight - Aluminum Used on the following parts: [PN: WIAB] RAD Industries 2JZ Billet Water Inlet Alternator Bracket [PN: RAD_UWN] RAD Industries Billet Upper Water Neck [PN: RACE_UWN] RAD Industries Billet Upper Water Neck *Race Version [PN: RAD_LWN] RAD Industries Billet Lower Water Neck