COMPATIBLE: Compatible with almost all that use standard 3/4inch NPT anode rod fittings including A.O. 44inch long anode rod hinged into four sections, each less than 12inch long, allows for easy anode rod replacement even in tight water heater areas; 3.5inch threads, use 1- 1/16inch socket (not included). Permanently eliminates the smell of rotten eggs in the water tank and attracts elements in the water, prolonging the life of the water heater. Replace the water heater anode rod every 2 years, saving money and time. Color: Silver Material: magnesium alloy Specification: Heat Pump Package Contents: 1 x Anode Rod 1 x Tape Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.