Zinc pencils for marine engines. All pencil zincs are complete units, with the bronze end plug.
E3C
PLUG N.P.T = 3/4"
ZINC SIZE = 3/4" x 2"
THREAD SIZE = 1/2-13
E4C
PLUG N.P.T = 3/4"
ZINC SIZE = 3/4" x 3 3/8"
THREAD SIZE = 1/2-13
E5C
PLUG N.P.T = 3/4"
ZINC SIZE = 3/4" x 3 5/8"
THREAD SIZE = 1/2-13
