"These anodes contain a single cast in galvanized steel mounting strap measuring 3/16"" x 11/4"" x 16"". Option: Holes in straps for bolt on ZSS 24Weight: 22-24 lbsSize: Width 3.5"" Height 2 3/4"" Length 12""Rating Amps/Year: 1.00Call if you want a MIL A 18001 spec anode."