R2 by AMERICAN ANODES CO.  Our "Best Buy" rated zinc anode in this category & size.  Also used as trim tab zincs.

• Size 2-13/16" diameter
• Pancake style, in two pieces
• Weight:  0.95 lbs.    Heavier than Camp Co.   
• Locked in place stainless nut
• Allen head stainless bolt
• U.S Mil-Spec
• Heavier than Camp and other manufacturers