HC2A Hull Anode – AluminumPerformance Metals Navalloyaluminum anodes are manufactured to the military specification MIL-DTL 24779 and are suitable for use in all water types- salt, brackish, or fresh.The anode includes the exclusive, patented red spot wear indicator.Replaces:ZHC-2 Specifications:Material: AluminumBox Dimensions: 1″H x 3″W x 6″L WT: 1.7 lbsUPC: 870648001352