Features: Pack Includes: You can get 2 pack RV water heater anode rod which is made from magnesium and can provide protection for water heater. Corroation Protection: Our water heater anode rod can provide protection for you and water heater. And it can provide safety whrn you wash a shower. Specifications: Material: magnesium Color: magnesium color Size: about ?21.6 x 1.22 x 1.22 inches Package includes: 2 Pack RV Water Heater Anode Rod Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.