Magnesium Hull Anode Candy Bar Anode 

Length:  7-1/2"
Width:  2-3/4"
Thickness:  1/2"
Horizontal Hole Distance:  1-3/4" center-to-center
Vertical Hole Distance:  1-3/8" center-to-center
Hole Diameter:  1/4"
Weight:  0.60 lbs.

Replaces M-40M, Martyr CMM40M, Tecnoseal Tec-40MG

Magnesium is for FRESH water use.

MILITARY GRADE MAGNESIUM