Hull Anode – AluminumUsed as a transom anode on many yachts.Performance 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:Z-406B-12B-14 Specifications:Material: AluminumBox Dimensions: 1″H x 4″W x 9″L WT: 1.6 lbsUPC: 870648001307