Mercury Alpha 1 Gen 1 Zinc Kit w/ Hardware New Dealer Direct Dealer Direct $35.58 Manufacturer Part Number 20800Z USM Brand US Marine Products LLC UPC 8059617814502 condition New Complete zinc anode kit for 1984-1990 Mercruiser MR & Alpha One drives. Kit Includes: 00806BIS Gimbal Housing Block, 00800 Trim Tab Short, 00807 Nut for Outdrive (2)Replaces: Sierra: 18-6150ZMartyr part #'s: CM31640 Trim Tab, CM55989 Gimbal Housing (2), CM821631 Gimbal Housing US Military Grade Zinc Is for Saltwater Use