Compatible with Water Heater Models Bosch 3000T ES2.5 and ES4 and Airston P10S P15S GL2.5 GL4 Gl2.5S GL4S GL2.5Ti, GL4Ti. High Quality and Safe Material: Pure High-Quality Magnesium anode rod made from top-quality magnesium AZ31-alloy, non-toxic, and entirely safe for the human body.
eBay