Martyr 3/8" x 1-3/4" Zinc Pencil Anode and Plug CME0 by Martyr $3.35 SKU MTRCME0C 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Size: 3/8" x 1-3/4" Plug I.P.S. 1/4"