Magnesium Anode for 12 and 20-Gallon Water Heater Raritan's Magnesium Anode is made specifically for Raritan's 12 and 20-Gallon Water Heater. Features: 16-1/8"; Stainless Steel Fitting; WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.- cis2:mm5mnJlm -Specifications: Material: Magnesium; Box Dimensions: 1"H x 1"W x 16"L WT: 0.75 lbs; UPC: 085462001673;