B-12 Hull Plate by American Anodes Co.  our "Best Buy" rated anode in this category & size.

• BLOW-OUT PRICING. BUY EXRAS BEFORE PRICES GO UP AGAIN.
• 4-1/4" wide x 8-3/4" long x 1" thick
• bolt spacing = 5 inches on center     holes = 7/16" inside diam.
• tested to last a full season
• this plate  is half the cost per pound of the Camp B-12
• we've sold literally thousands of this U.S Mil-Spec A18001 anode to commercial divers, boat yards and yacht owners.